Best French Toilets (2026)
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The one bowl spec that most buyers never measure
Toilet Shape Guide: Elongated, Round, Compact Elongated
Toilet bowl shape is a two-inch decision that most buyers ignore until they sit down and realize they ordered wrong. Elongated bowls add roughly two inches of front-to-back length over round, which matters for comfort in an adult-use bathroom but can block a door swing or crowd a small half-bath. Compact elongated is the hybrid that splits that difference. This guide defines each shape precisely, maps which models come in which shapes, explains how flush performance interacts (and does not interact) with shape, and gives you a clear decision framework for every bathroom scenario.
Why Trust Best Flushing Toilets
- Flushing power and MaP flush-test scores
- Water efficiency (GPF and EPA WaterSense)
- Aggregated owner reviews
- Clog resistance and trapway design
- Brand reliability and warranty
Research updated June 2026.
Quick Answer
For most adult bathrooms with at least 30 inches of clear space in front of the bowl, choose elongated. The TOTO Drake II (elongated, 1000 g MaP at 1.28 GPF) is the default pick. For bathrooms under 30 inches of clearance, choose compact elongated. Round suits only dedicated children's bathrooms or genuinely cramped powder rooms where every inch counts.
Bowl shape sits at the intersection of comfort and clearance. It does not change flush power, water efficiency or clog resistance -- those are determined by trapway diameter, flush valve design and bowl geometry independent of whether the front of the bowl is round or oval. What shape does change is how much floor space the toilet occupies and how comfortable it is to sit on for extended use. Get those two numbers right and the shape decision is straightforward. Get them wrong and you end up with a toilet that either crowds the bathroom or feels undersized for the people using it.
This guide covers every shape in current production: round, elongated, and compact elongated. It draws on published manufacturer specifications, independent MaP (Maximum Performance) flush-test data, EPA WaterSense certification records, and consistent patterns across aggregated owner reviews. For the full performance picture, our roundup of the best flushing toilets ranks the models that perform best once you have settled on a shape. Our dedicated pages for best elongated toilets and best round bowl toilets go deeper on the top picks in each category.
| Shape | Bowl Length (front-to-back) | Best For | Space Needed | Comfort (Adults) |
|---|---|---|---|---|
| Elongated | ~18.5 in | Most adult bathrooms | 30+ in clearance | Best |
| Compact Elongated | ~17 to 17.5 in | Small bathrooms, adult comfort | 28 to 30 in clearance | Very Good |
| Round | ~16.5 in | Kids' baths, powder rooms | 26 to 28 in clearance | Fair |
Common question
What Is the Difference Between Elongated and Round Toilet Bowls?
An elongated toilet bowl measures approximately 18 to 18.5 inches from the mounting holes to the front rim, while a round bowl measures approximately 16 to 16.5 inches -- a difference of roughly two inches. Elongated bowls provide more seating surface and are more comfortable for most adults. Round bowls occupy less floor space and suit tighter bathrooms, children's bathrooms, or powder rooms where clearance is limited.
The three bowl shapes defined with precise measurements
Round bowls measure approximately 16 to 16.5 inches from the center of the mounting holes (at the back of the bowl) to the front rim. The shape is close to circular when viewed from above, though no production bowl is a perfect circle. Round bowls were the dominant residential shape in North America through most of the 20th century, and they remain widely available from every major manufacturer. The American Standard Champion 4 is available in round configuration, as is the TOTO Drake and the Kohler Highline. Round requires the least front-to-back floor space, which is why it remains the choice for genuinely constrained powder rooms and dedicated children's bathrooms.
Elongated bowls measure approximately 18 to 18.5 inches from the mounting holes to the front rim. The shape is oval when viewed from above, extending further forward than a round bowl by roughly two inches. That two inches translates directly into more seating surface, more comfortable front clearance for most adults, and a slightly larger opening for hygiene purposes. Elongated has become the default shape for adult bathrooms in new North American construction over the past two decades. Models like the TOTO Drake II, TOTO UltraMax II, Kohler Cimarron, American Standard Cadet 3, and Woodbridge T-0001 are all offered primarily or exclusively in elongated configuration.
Compact elongated bowls (also marketed as "compact" or "round front elongated" by some brands) measure approximately 17 to 17.5 inches from the mounting holes to the front rim -- splitting the difference between round and elongated. The shape is elongated in its seat opening, which provides elongated-level comfort, but the overall footprint is closer to a round bowl. TOTO introduced the compact elongated category with models like the Entrada and several Washlet+ configurations. Kohler offers compact elongated in the Wellworth line. The compact elongated format has grown significantly because it solves the specific problem of a bathroom that is too small for a full elongated bowl but where the buyer does not want to sacrifice adult seating comfort.
Expert Take
The two-inch difference between round and elongated sounds trivial in a showroom and significant the moment you sit down on both in the same visit. Bowl shape is the one spec where the difference is immediately obvious to most people and almost never obvious from a product listing alone. Before ordering, measure from the rear wall (or from a toilet in the same rough-in position) to where the front of the bowl will land, then subtract the bowl length from that number. What remains is your clearance. Thirty inches of clearance in front of an elongated bowl is comfortable; under 28 inches tends to feel cramped regardless of shape.
Common question
Does Bowl Shape Affect Flush Performance or MaP Score?
Bowl shape does not directly determine flush performance. MaP scores and GPF ratings are assigned to specific toilet models tested as a complete unit; the same bowl shape can appear in both high-performing and average-performing toilets. What matters for flush power is trapway diameter, flush valve design, water volume and bowl geometry -- none of which are determined solely by whether the bowl is round or elongated.
How bowl shape interacts with flush performance
Bowl shape and flush performance are frequently conflated but are actually independent specs. The MaP (Maximum Performance) flush test, which measures the maximum mass of solid waste a toilet can clear in a single flush with no additional water, tests complete toilet models -- not bowl shapes in isolation. A round version and an elongated version of the same model achieve essentially identical MaP scores because the flush pathway, trapway diameter and water delivery mechanism are the same.
The TOTO Drake provides a useful illustration. The round-front Drake and the elongated Drake both achieve a perfect 1000 g MaP flush at 1.28 GPF. Both carry EPA WaterSense certification. The flushing internals are identical. The only thing that changes between the two configurations is the bowl's front-to-back dimension. Buyers who are worried that choosing round to save space means giving up flush power can rule that concern out across virtually every major brand. The TOTO Drake, Kohler Highline, American Standard Champion 4, and Kohler Cimarron all maintain their MaP scores regardless of which bowl shape the buyer selects.
Where bowl geometry does intersect with flush behavior is in the siphon jet and rim jet hole placement within a specific model. These are engineered for that model's bowl contour, not shared between shapes. But that means each shape in a model line is independently optimized, not that one shape flushes worse than the other. Both are designed to perform. The takeaway: choose bowl shape based on clearance and comfort, not on any assumption about flush strength.
| Model | Shape Options | MaP Score | GPF | WaterSense | Check Price |
|---|---|---|---|---|---|
| TOTO Drake II | Elongated only | 1000 g | 1.28 | Yes | Check price |
| TOTO Drake | Round + Elongated | 1000 g | 1.28 | Yes | Check price |
| Kohler Cimarron | Elongated only | 1000 g | 1.28 | Yes | Check price |
| Kohler Highline | Round + Elongated | 800+ g | 1.28 | Yes | Check price |
| American Standard Champion 4 | Round + Elongated | 1000 g | 1.6 | No | Check price |
| American Standard Cadet 3 | Round + Elongated | 1000 g | 1.28 | Yes | Check price |
| TOTO Entrada | Round + Compact Elongated | 800+ g | 1.28 | Yes | Check price |
| Woodbridge T-0001 | Elongated only | 800+ g | 1.28 | Yes | Check price |
Common question
What Is a Compact Elongated Toilet Bowl and Who Should Choose It?
A compact elongated toilet bowl measures approximately 17 to 17.5 inches from the mounting holes to the front rim, about one to one and a half inches shorter than a standard elongated bowl but with the same oval seat opening that elongated users prefer. It suits bathrooms where a full elongated bowl would crowd a door swing or leave less than 28 to 30 inches of clearance in front of the toilet, while still providing adult-level seating comfort superior to a round bowl.
Compact elongated: the shape most buyers do not know exists
Compact elongated is the most underused option in the toilet market. Most buyers know round and elongated. Many assume they must choose between adult comfort and bathroom space. Compact elongated resolves that trade-off directly: the seat opening is elongated-shaped, which is wider and more comfortable than a round bowl for adults, but the overall bowl length is roughly one to one and a half inches shorter than a full elongated. That saves meaningful space in a small bathroom without surrendering the comfort advantage of an elongated seat.
TOTO is the most prominent manufacturer of compact elongated bowls. The TOTO Entrada, TOTO Eco Ultramax and several TOTO Washlet+ configurations are available in compact elongated. Kohler markets a similar profile in certain Wellworth models under the description "round front." Swiss Madison offers compact elongated options in the Clarence and Well series. The key spec to check: front-to-back bowl length. Anything from approximately 16.75 to 17.5 inches is compact elongated territory. A full elongated will be 18 to 18.5 inches. A round bowl will be 16 to 16.5 inches.
Compact elongated is particularly useful for three scenarios: small primary bathrooms where clearance is tight but adult users do not want to compromise on seating surface; guest bathrooms and vacation rentals that serve mixed-age adults where a round bowl feels undersized; and powder rooms in older homes where the rough-in and layout leave limited front clearance but the buyer wants to upgrade from an aging round toilet to something more comfortable without a costly bathroom remodel. If you are in any of those situations, check whether the model you want is available in compact elongated before defaulting to round.
Expert Take
Compact elongated is the right answer for far more bathrooms than currently use it. Most buyers default to round when they discover elongated will not fit, never realizing that compact elongated exists in the same product family. Before accepting a round bowl as the only small-bathroom option, check the same brand's compact elongated offering. In the TOTO line, the Entrada compact elongated provides measurably more seating comfort than the Entrada round at the same floor footprint as many round-bowl models, with an EPA WaterSense-certified 1.28 GPF flush and solid MaP performance. The one-inch trade-off is usually worth making.
Common question
How Much Space Do You Need in Front of the Toilet for Each Bowl Shape?
Building codes in most jurisdictions require a minimum of 21 inches of clear space in front of a toilet, but comfortable use requires 28 to 30 inches. An elongated bowl (approximately 18.5 inches long) fits comfortably when the distance from the rear wall to whatever is in front of the toilet is at least 47 to 48 inches. A compact elongated bowl (approximately 17 to 17.5 inches) reduces that requirement by one to one and a half inches. A round bowl (approximately 16.5 inches) provides the most clearance but the least seating comfort.
How to measure your bathroom for bowl shape
Measuring correctly prevents the most common bowl-shape mistake, which is ordering elongated based on catalog specs only to find the bowl crowds the door, vanity or opposite wall. The measurement you need is not the bathroom's total square footage. It is the distance from the center of the floor drain (or the back wall if you are measuring from an existing toilet position) to whatever faces the toilet: a wall, a door in its swing arc, a vanity edge or a bathtub.
Standard procedure: measure from the finished wall behind the toilet to the obstacle in front of it. From that total, subtract the rough-in distance (the distance from the wall to the drain center, typically 12 inches but sometimes 10 or 14 inches) to find how much space the toilet bowl itself can occupy before eating into clearance. Subtract the bowl length from that number to find the remaining clearance. Building code minimums are 21 inches of clearance in front of the bowl, but comfortable everyday use needs 28 to 30 inches. ADA requires 48 inches from the front of the bowl to any obstruction in an accessible bathroom.
Example: a small bathroom has 60 inches from the rear wall to the facing vanity. Rough-in is 12 inches. Remaining space for the bowl plus clearance is 48 inches. An elongated bowl at 18.5 inches leaves 29.5 inches of clearance -- comfortable. A compact elongated at 17.5 inches leaves 30.5 inches -- slightly more. A round bowl at 16.5 inches leaves 31.5 inches -- the extra inch rarely matters if compact elongated already fits. In a bathroom where that total drops to 44 inches, elongated leaves only 25.5 inches of clearance (code minimum is 21 inches, but this is tight), compact elongated leaves 26.5 inches, and round leaves 27.5 inches. At that point, compact elongated or round becomes the practical choice, with compact elongated preferred for adult comfort.
| Bowl Shape | Bowl Length | Min. Wall-to-Obstruction for 30 in Clearance | Min. Wall-to-Obstruction for Code (21 in) |
|---|---|---|---|
| Elongated | ~18.5 in | ~60.5 in (12 in RI + 18.5 in bowl + 30 in) | ~51.5 in |
| Compact Elongated | ~17 to 17.5 in | ~59 to 59.5 in | ~50 to 50.5 in |
| Round | ~16.5 in | ~58.5 in | ~49.5 in |
Note: All examples assume a 12-inch rough-in, which is the most common residential dimension. If your rough-in is 10 or 14 inches, adjust the wall-to-obstruction figures by the same margin. Our guide to toilet rough-in measurement explains how to measure rough-in accurately before ordering any toilet.
Which bowl shape is best for specific bathrooms?
Master bathroom: If clearance allows, elongated is the default choice. Adults use the master bathroom most frequently and benefit most from the added seating surface. The TOTO Drake II (elongated, 1000 g MaP, 1.28 GPF, EPA WaterSense) is the most consistently recommended model for this application across plumber surveys and owner review data. The Kohler Cimarron elongated and American Standard Cadet 3 elongated are strong alternatives at a lower price point. If the master bath is a narrow galley layout with under 57 inches of total room depth, measure before ordering and consider compact elongated.
Small primary bathroom or guest bathroom: Compact elongated is often the best fit. It provides adult-level seating comfort while requiring one to one and a half fewer inches of clearance than a full elongated bowl. The TOTO Entrada compact elongated at 1.28 GPF and EPA WaterSense certification is the most widely stocked compact elongated option. Swiss Madison and Kohler (Wellworth series) also offer compact elongated options. Check the front-to-back bowl dimension in the product specs -- do not rely on the label alone, as "round front" and "compact elongated" are used inconsistently across brands.
Powder room or half-bath: These rooms are typically the smallest in the house and are the primary use case where round still makes clear sense. A powder room used primarily by guests for brief visits does not demand elongated comfort, and the extra clearance a round bowl provides in a tight layout is genuinely useful. The TOTO Drake round and American Standard Cadet 3 round both maintain the same MaP scores as their elongated counterparts. For a powder room where the toilet nearly touches the sink or the door clears the front of the bowl by inches, round is the practical answer.
Children's bathroom: Round or compact elongated, depending on the bathroom size. Young children find a smaller round bowl easier to use, and the front lip of an elongated bowl adds complexity for small users during potty training. If the children will continue using the bathroom into teenage years, compact elongated is a reasonable compromise because the bathroom will serve them better as they grow without requiring a bowl replacement. For a bathroom dedicated to small children for at least several years, round is the lower-maintenance choice.
Accessible bathroom: Bowl shape does not determine ADA compliance directly; seat height and surrounding clearances do. But elongated bowls are standard in ADA-compliant toilet designs because the additional seat surface supports users who transfer from wheelchairs. The Kohler Highline Comfort Height elongated and American Standard Cadet 3 Right Height elongated are both widely used in ADA-compliant accessible bathrooms. Check your jurisdiction's code for complete clearance requirements beyond bowl shape.
Common question
Can You Replace a Round Toilet Bowl with an Elongated Bowl?
Yes, you can replace a round toilet with an elongated toilet without any plumbing modifications, provided the rough-in distance (from the rear wall to the drain center) is the same. The rough-in dimension -- typically 12 inches in most homes -- determines plumbing compatibility, not bowl shape. The only practical constraint is clearance: the elongated bowl will extend roughly two inches further into the room than the round bowl it replaces, so confirm you have adequate front clearance before ordering.
Replacing round with elongated: what to check first
Swapping bowl shape during a toilet replacement is one of the most common upgrade decisions homeowners make, and it is straightforward from a plumbing perspective. The drain connection and water supply line connection are identical between round and elongated toilets in the same model line. What the plumber cares about is rough-in distance, not bowl shape. If you are replacing a 12-inch rough-in round toilet with a 12-inch rough-in elongated model, the connections are the same.
The constraint is clearance. Before replacing round with elongated, measure from the front edge of the existing round bowl to whatever faces it. You will be adding roughly two inches to that dimension. If you currently have 30 inches of clearance in front of a round bowl, you will have 28 inches after installing elongated -- still comfortable for most users. If you currently have 23 inches of clearance, adding two inches to the bowl length drops you to 21 inches, which meets the bare code minimum but will feel cramped in daily use. In that scenario, compact elongated is the better choice: it gains you the comfort of an elongated seat opening while adding only one inch of length over round.
One scenario worth flagging: older homes built before the mid-20th century sometimes have 10-inch or 14-inch rough-in distances rather than the standard 12 inches. Most major brands offer elongated bowls in all three rough-in sizes, but you need to confirm the rough-in before ordering. See our toilet rough-in measurement guide for the exact measurement procedure. Ordering the wrong rough-in dimension is a more costly error than ordering the wrong bowl shape.
Expert Take
The shape swap that most often surprises buyers is going from round to elongated in a small bathroom where clearance was already marginal. Two inches sounds like very little. In a bathroom where the vanity faces the toilet directly and the occupant already felt the room was snug, two additional inches on the bowl can make the space feel meaningfully tighter, not because the toilet is poorly designed but because the geometry was already close to its limit. Measure before you order, confirm your clearance number, and consider compact elongated whenever the remaining clearance after installing full elongated would be under 28 inches.
Bowl shape and toilet seat compatibility
Toilet seats are manufactured to match bowl shape precisely. An elongated seat will not fit properly on a round bowl, and a round seat will not fit on an elongated bowl -- the mounting holes will align (they use the same bolt spacing) but the seat will overhang or underlap the front of the bowl, which is both uncomfortable and potentially unstable. Compact elongated bowls typically require compact elongated seats, which are sold under that name by TOTO and other brands that use this format.
When purchasing a toilet seat separately from the toilet (for a replacement seat, a heated bidet seat or an upgrade soft-close seat), confirm the bowl shape designation matches. Most listings specify "elongated" or "round" clearly. For compact elongated bowls, look specifically for compact elongated seats or check the front-to-back seat measurement against the bowl measurement. The seat should extend to within a quarter inch of the front rim on a properly matched elongated seat. A noticeable gap at the front means the seat is too short (round on elongated bowl); visible overhang at the front means the seat is too long (elongated on round bowl).
One common scenario where shape mismatch creates problems: buying a bidet seat. Bidet seats are seat replacements that mount the same way as a standard seat. Because bidet seats are a meaningful purchase, buyers sometimes order them before confirming the toilet's bowl shape. The result is a bidet seat that does not fit properly. Before purchasing any replacement seat or bidet seat, check the bowl shape listed on your toilet's model sticker (usually located inside the tank lid) or look up the model number on the manufacturer's website. Our guide to best bidet toilet seats includes a seat compatibility section with specific model matchings.
Top picks by bowl shape
These are the models with the strongest combination of MaP flush score, EPA WaterSense certification, owner review consistency and shape availability based on published manufacturer data and independent test results.
Elongated picks
Best elongated bowl toilets
1
Best Overall Elongated
TOTO Drake II Two-Piece Elongated 1.28 GPF
4.8
Best For: Most adult primary bathrooms
The TOTO Drake II earns its place at the top of every elongated toilet list: a perfect 1000 g MaP flush at 1.28 GPF, a fully glazed CeFiONtect trapway that resists particle adhesion, comfort height seating near 17.25 inches, and EPA WaterSense certification that saves water without sacrificing flush power.
Bowl ShapeElongated
MaP Score1000 g (max)
GPF1.28
WaterSenseYes
TrapwayFully glazed, 2.125 in
Pros
- Perfect 1000 g MaP score
- EPA WaterSense at 1.28 GPF
- CeFiONtect glaze resists staining
- Two-piece design for easier shipping
- Widely available replacement parts
Cons
- Available in elongated only (no round option)
- Tank and bowl ship separately
- Seat sold separately
The Drake II's elongated bowl measures approximately 18.5 inches front-to-back, so confirm your bathroom has adequate clearance before ordering. The two-piece design ships in smaller boxes than one-piece models, making it easier to carry up stairs or through narrow doors. The G-Max double-cyclone flush system uses two nozzles rather than a traditional rim wash, which reduces the number of rim holes that can accumulate mineral deposits over time.
Owner reviews across major retail platforms consistently rate the Drake II highly for flush reliability and bowl cleanliness between washes. The fully glazed trapway is cited frequently as a reason clogs are rare. TOTO's one-year parts warranty is standard for the category; the ceramic itself carries a longer limited warranty. This is the model plumbers most consistently recommend when asked for an elongated toilet that will simply work without complaint for years.
Expert Take
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The Drake II's G-Max flush was designed around a single 1.28 GPF tank discharge -- a volume constraint that makes the double-nozzle system more efficient per drop than single-nozzle designs at the same water volume. The combination of nozzle placement, bowl geometry and fully glazed 2.125-inch trapway is why the Drake II consistently achieves 1000 g MaP despite using half the water of a 1970s-era 3.5 GPF toilet.
Bottom Line: The TOTO Drake II is the elongated toilet benchmark -- the model everything else is compared against.
2
Best Value Elongated
Kohler Cimarron Comfort Height Elongated 1.28 GPF
4.7
Best For: Adult bathrooms, value-conscious buyers
The Kohler Cimarron matches the TOTO Drake II's 1000 g MaP score at 1.28 GPF with Kohler's Class Five flush technology, which uses a direct-feed design that delivers water to the bowl with a 3.25-inch flush valve -- among the largest in the residential market -- delivering a strong, quiet flush that owner reviews consistently praise.
Bowl ShapeElongated
MaP Score1000 g (max)
GPF1.28
WaterSenseYes
Flush Valve3.25 in Class Five
Pros
- 1000 g MaP at 1.28 GPF
- Large 3.25-inch flush valve
- EPA WaterSense certified
- Widely available parts and seats
- Available in multiple colors
Cons
- Elongated only (no round or compact elongated)
- Trapway not fully glazed on all versions
- Seat sold separately on most SKUs
The Cimarron is available in Comfort Height and standard height, both in elongated bowl configuration. The elongated bowl measures approximately 18.25 inches from mounting holes to front rim, slightly shorter than the Drake II but well within the elongated category. The Class Five canister flush valve has fewer moving parts than a traditional flapper assembly, which reduces the frequency of seal replacement over the toilet's lifespan.
Owner reviews highlight the quiet flush as a standout feature. Many users replacing an older or noisier toilet note that the Cimarron's flush is noticeably subdued at the same or better flush performance level. Kohler's warranty coverage and parts availability through home improvement retailers make this a practical choice for bathrooms where DIY maintenance is preferred over calling a plumber for seal replacements.
Expert Take
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The Cimarron's Class Five canister design is worth understanding before dismissing it as a marketing term. A canister lifts the entire seal rather than pivoting a flapper, which means water flows from the bottom of the tank straight into the bowl through the full diameter of the valve opening from the first millisecond of the flush. That rapid delivery is why the Cimarron achieves 1000 g MaP on only 1.28 gallons -- the water arrives all at once rather than ramping up as a traditional flapper opens.
Bottom Line: The Kohler Cimarron delivers maximum MaP performance with a quieter flush and excellent parts availability at a competitive price.
Compact elongated pick
Best compact elongated bowl toilet
3
Best Compact Elongated
TOTO Entrada Two-Piece Compact Elongated 1.28 GPF
4.6
Best For: Small bathrooms needing adult comfort
The TOTO Entrada is the most widely recommended entry point into the TOTO lineup and the clearest demonstration that compact elongated can deliver adult comfort without full elongated floor space. Its compact elongated bowl provides an elongated seat opening in a package that saves one to one and a half inches over a standard elongated bowl, with EPA WaterSense certification at 1.28 GPF.
Bowl ShapeCompact Elongated
MaP Score800+ g
GPF1.28
WaterSenseYes
Bowl Length~17 in front-to-back
Pros
- Compact elongated seat comfort in smaller footprint
- EPA WaterSense at 1.28 GPF
- TOTO build quality and warranty
- Available in round and compact elongated
Cons
- MaP score lower than Drake/Drake II at 800+ g vs 1000 g
- No CeFiONtect glaze coating
- Seat sold separately
The Entrada is the right answer for a buyer who has measured and found that a full elongated bowl will leave under 28 inches of clearance, but who does not want to fall back to a round bowl and lose adult seating comfort. The compact elongated configuration saves enough space to maintain comfortable clearance while keeping the oval seat opening that most adults prefer. TOTO's E-Max gravity flush system achieves efficient bowl cleaning on 1.28 GPF with a 2-inch flush valve and a fully siphonic action.
Owner reviews are positive on value and fit for small-bathroom applications. The Entrada is typically the most affordable toilet in the TOTO catalog while still reflecting TOTO's build standards and parts availability. The trade-off versus the Drake or Drake II is the lower MaP score (800+ g versus 1000 g) and the absence of the CeFiONtect glaze that prevents particle adhesion on higher-end TOTO models. For a bathroom with typical residential waste loads, 800+ g MaP is sufficient; only households with documented heavy-use clogging history should prioritize 1000 g as a requirement.
Expert Take
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The Entrada's MaP score of 800+ g versus the Drake II's 1000 g represents a meaningful difference on paper that rarely matters in daily residential use. MaP testing uses a solid waste simulant in quantities that represent the high end of residential flushing demand. Most households never approach the 800 g threshold. The Entrada is better suited to a compact bathroom that needs adult comfort than a round bowl at the same price with only slightly better clearance and no seating advantage.
Bottom Line: The TOTO Entrada compact elongated is the clearest solution for small bathrooms that need adult comfort without the full footprint of an elongated bowl.
Round pick
Best round bowl toilet
4
Best Round Bowl
American Standard Champion 4 Round Front 1.6 GPF
4.6
Best For: Powder rooms, small bathrooms, heavy-use applications
The American Standard Champion 4 earns its reputation on clog resistance: a 4-inch accelerator flush valve, a fully glazed 2.375-inch trapway (the widest in its category), and a 1000 g MaP score on 1.6 GPF. It is the round bowl choice when maximum clog resistance takes priority and the bathroom is too tight for elongated.
Bowl ShapeRound Front
MaP Score1000 g (max)
GPF1.6
TrapwayFully glazed, 2.375 in
WaterSenseNo (1.6 GPF)
Pros
- 1000 g MaP -- exceptional clog resistance
- Widest trapway in its class at 2.375 inches
- Round bowl for maximum clearance
- Available in round and elongated
Cons
- 1.6 GPF -- not EPA WaterSense certified
- Uses more water than 1.28 GPF alternatives
- Bulkier tank than WaterSense competitors
The Champion 4's 4-inch flush valve is significantly larger than the 2 to 2.5-inch valves used by most competitors, delivering a higher volume of water to the bowl in a shorter time window. That rapid delivery, combined with the 2.375-inch glazed trapway, explains the 1000 g MaP score and the model's consistent reputation for handling heavy use without clogging. In the round bowl configuration, the Champion 4 maximizes clearance in constrained bathrooms while maintaining top-tier flush performance.
The 1.6 GPF water volume means the Champion 4 does not qualify for EPA WaterSense certification (which requires 1.28 GPF or less), which is relevant for households in water-restricted regions or buyers seeking to maximize water savings. For households with a documented clog history, hard water, or high-traffic use, the higher flush volume of the Champion 4 round may justify the trade-off over a WaterSense-certified 1.28 GPF model. The Gerber Viper 1.28 GPF round is a viable alternative if WaterSense certification is required in a round bowl format.
Expert Take
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The Champion 4's 1.6 GPF is often cited as a disadvantage versus 1.28 GPF WaterSense toilets, but for households with recurring clogs or heavy waste loads, the additional water volume is exactly what makes the difference. The 4-inch flush valve and 2.375-inch trapway combination was engineered for reliable single-flush clearance under demanding conditions. In a powder room with narrow clearance where elongated is not an option, the Champion 4 round delivers maximum flush reliability within the tightest footprint available from a major brand.
Bottom Line: The American Standard Champion 4 round is the highest-performing round bowl toilet available from a major brand, trading water efficiency for unmatched clog resistance.
Bowl shape and toilet seat fit: the compatibility rules
Every toilet seat is labeled for one of three bowl shapes: round, elongated, or compact elongated. The bolt hole spacing is the same across all three (approximately 5.5 inches center-to-center for the mounting bolts at the rear of the bowl), so the seat will physically bolt onto any toilet. The difference is the seat's front-to-back length and the curvature of the front edge. An elongated seat on a round bowl will overhang the front rim by approximately two inches, creating a gap underneath the front of the seat. A round seat on an elongated bowl will sit with the front of the seat recessed by approximately two inches, exposing the front of the bowl rim and reducing the seat's effectiveness.
The rule: always match the seat shape designation to the bowl shape. Before purchasing a heated toilet seat, bidet seat, or replacement soft-close seat, look up your toilet's model number (on the sticker inside the tank lid) and confirm the published bowl shape. Then purchase a seat that matches. For compact elongated bowls, some manufacturers (particularly TOTO) sell seats explicitly labeled "compact elongated" or by the model's specific shape designation. When in doubt, measure the front-to-back inside dimension of the bowl from the bolt holes to the front rim and match a seat with the same or slightly shorter front-to-back measurement.
Our Verdict
For most adult bathrooms, elongated is the right shape: more seating surface, better comfort, and no flush performance trade-off. The TOTO Drake II at 1000 g MaP and 1.28 GPF is the strongest elongated pick. When clearance is tight, compact elongated preserves adult comfort while saving one to one and a half inches. Reserve round for genuine powder rooms and dedicated children's bathrooms where clearance is the binding constraint and comfort is secondary. Measure your clearance before ordering -- that single step prevents the most common shape-related returns.
Frequently Asked Questions
What is the difference between a round and elongated toilet bowl?
A round toilet bowl measures approximately 16 to 16.5 inches from the mounting holes to the front rim. An elongated bowl measures approximately 18 to 18.5 inches -- about two inches longer. Elongated bowls provide more seating surface and are more comfortable for most adults. Round bowls occupy less floor space and suit tight bathrooms, children's bathrooms, and powder rooms.
Does bowl shape affect flush strength?
No. Flush strength is determined by trapway diameter, flush valve size, water volume (GPF) and bowl geometry engineered for that specific model. Round and elongated versions of the same toilet achieve the same MaP flush test score because the flushing mechanism is identical between shape variants. Bowl shape is purely about comfort and floor space.
What is a compact elongated toilet bowl?
A compact elongated bowl measures approximately 17 to 17.5 inches front-to-back -- one to one and a half inches shorter than a standard elongated bowl (18 to 18.5 inches) but with the same oval seat opening. It provides elongated-level seating comfort in a smaller footprint, making it ideal for bathrooms where a full elongated bowl would leave inadequate clearance.
Which toilet bowl shape is most comfortable?
Elongated is the most comfortable for adults because the longer oval seat opening provides more front-to-back seating surface and more clearance at the front of the bowl. Compact elongated is nearly as comfortable and suits smaller bathrooms. Round is adequate for children and short-duration use but most adults notice the reduced surface area compared to elongated during extended use.
How much space do I need in front of an elongated toilet?
Building codes typically require a minimum of 21 inches of clear space in front of a toilet, but comfortable daily use requires 28 to 30 inches. For a standard 12-inch rough-in toilet with an elongated bowl (18.5 inches), you need at least 51.5 inches from the rear wall to the facing obstacle to meet code, and ideally 60 inches or more for comfort. Compact elongated reduces this by about one inch.
Can I replace my round toilet with an elongated toilet?
Yes. The rough-in distance (from the wall to the drain center) determines plumbing compatibility, not bowl shape. If you replace a 12-inch rough-in round toilet with a 12-inch rough-in elongated toilet, the connections are identical. The only practical constraint is that the elongated bowl will extend roughly two inches further into the room, so confirm adequate clearance before ordering.
Which brands offer compact elongated toilets?
TOTO is the most prominent manufacturer of compact elongated toilets, offering the format in the Entrada, Eco Ultramax, and several Washlet+ series models. Kohler offers a similar compact configuration in certain Wellworth models. Swiss Madison and Gerber also produce compact elongated options. Always verify the front-to-back bowl measurement in the product specifications rather than relying on category labels, which vary by brand.
Does the TOTO Drake come in round or elongated?
The TOTO Drake is available in both round and elongated configurations, both at 1.28 GPF with a 1000 g MaP score and EPA WaterSense certification. The TOTO Drake II is available in elongated only. Both models use the same G-Max or Double Cyclone flushing internals regardless of bowl shape, so the flush performance is identical between shape variants.
Does the American Standard Cadet 3 come in round and elongated?
Yes. The American Standard Cadet 3 is available in both round and elongated configurations, both at 1.28 GPF with a 1000 g MaP score and EPA WaterSense certification. The elongated version is available in standard height and Right Height (comfort height). The round version is also available in standard height and Right Height. Both shapes use identical flushing internals.
Will an elongated toilet seat fit on a round bowl?
Not properly. Although the mounting bolt holes share the same spacing, an elongated seat is approximately two inches longer front-to-back than a round bowl. The seat will overhang the front of the bowl, creating instability and an aesthetically poor fit. Always match the seat shape designation (round, elongated, or compact elongated) to the bowl shape designation on your toilet model.
What toilet bowl shape is best for a small bathroom?
Compact elongated is the best choice for a small bathroom where adults are the primary users. It provides the seating comfort of an elongated bowl in a footprint that is one to one and a half inches shorter. If the bathroom is so constrained that even compact elongated does not fit comfortably, a round bowl with a strong flush (such as the TOTO Drake round) is the appropriate fallback.
Which toilet bowl shape is best for seniors?
Elongated bowl in a comfort height or ADA-compliant model is the best combination for seniors. The elongated seat provides more surface area and makes it easier to shift weight when sitting or standing. The comfort height or ADA seat height (16 to 19 inches) reduces the knee flex required to sit down and stand up. Models like the Kohler Highline Comfort Height elongated and TOTO Drake II are frequently specified in aging-in-place bathroom designs.
What bowl shape does the Kohler Cimarron use?
The Kohler Cimarron is available in elongated bowl configuration in both Comfort Height and standard height variants. It is not offered in round or compact elongated in the standard Cimarron product line. At 1.28 GPF with a 1000 g MaP score, Class Five flush technology, and EPA WaterSense certification, it is one of the strongest elongated-only models available.
What is the toilet bowl shape for the Woodbridge T-0001?
The Woodbridge T-0001 uses an elongated bowl. It is a one-piece toilet available in elongated configuration only, with a 1.28 GPF dual-flush system and EPA WaterSense certification. The clean skirted design and elongated bowl make it a popular choice for modern-style bathrooms where the two-inch elongated footprint fits comfortably.
Is round or elongated better for a powder room?
Round is typically better for a powder room because powder rooms are usually small and guests use them only briefly. The two-inch clearance advantage of a round bowl can make the difference between a comfortable layout and a cramped one. Compact elongated is a viable option if the powder room has adequate depth, since it adds some seating comfort without the full elongated footprint.
How do I measure my toilet's bowl shape?
Measure from the center of the rear mounting holes (where the seat bolts attach) to the front outer rim of the bowl. A measurement of approximately 16 to 16.5 inches indicates a round bowl. A measurement of approximately 17 to 17.5 inches indicates compact elongated. A measurement of approximately 18 to 18.5 inches indicates a standard elongated bowl. This measurement is more reliable than checking the product label, which uses inconsistent terminology across brands.
Does EPA WaterSense certification depend on bowl shape?
No. EPA WaterSense certification requires that a toilet flush at 1.28 GPF or less and clear the bowl effectively, regardless of bowl shape. Both round and elongated versions of a qualifying model receive WaterSense certification independently. The American Standard Cadet 3, TOTO Drake and Kohler Cimarron all carry WaterSense certification in the bowl shapes they offer without any shape-based restriction.
What is the minimum toilet rough-in distance and does it vary by bowl shape?
The minimum rough-in distance refers to the distance from the finished rear wall to the center of the floor drain, most commonly 12 inches in residential construction (also available in 10 and 14 inch). Rough-in distance is independent of bowl shape. A 12-inch rough-in elongated toilet and a 12-inch rough-in round toilet both connect to the same drain position. The rough-in spec must match the plumbing; the bowl shape is a separate choice made for comfort and space reasons.
How does bowl shape affect bidet seat compatibility?
Bidet seats are manufactured in round, elongated, and sometimes compact elongated versions. The mounting bolt holes align across shapes, but the seat's overall dimensions must match the bowl's front-to-back measurement for a proper fit. An elongated bidet seat on a round bowl will overhang the front rim. Check the bidet seat's labeled bowl shape and compare it against your toilet model's published bowl shape before purchasing. Most bidet seat manufacturers list compatibility tables by toilet model.
Which toilet bowl shape does the TOTO UltraMax II use?
The TOTO UltraMax II is a one-piece toilet available in elongated bowl configuration. It achieves a 1000 g MaP score at 1.28 GPF using TOTO's Double Cyclone flush technology with CeFiONtect glaze. The one-piece design and elongated bowl make it a popular choice for master bathrooms where appearance and ease of cleaning are priorities alongside flush performance.
Sources
- EPA WaterSense, epa.gov/watersense
- MaP flush testing, map-testing.com
- Manufacturer published specifications
How we rank & our data sources
We do not run physical lab tests. Rankings are built from published, verifiable data and real owner feedback, never paid placement.
- MaP (Maximum Performance) flush scores
- EPA WaterSense certification & GPF ratings
- Manufacturer specifications (trapway size, flush-valve, rough-in)
- Verified owner reviews from Amazon, Home Depot & Lowe’s
Researched by Marcus Bell · Last updated June 28, 2026 · Our review method
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