Choosing the best one piece toilet bowl comes down to fit, seat height, flush performance, and how much water you want to use. The options below include compact round-bowl models for tight bathrooms and elongated-bowl designs for a roomier feel. Compare the listed dimensions with your bathroom measurements, and confirm the rough-in before ordering.
Table of Contents
Quick Comparison
| Toilet | Bowl and seat | Flush | Standout feature |
|---|---|---|---|
| DeerValley Compact Round-Bowl Toilet | Round bowl; standard seat height | 1.1/1.6 GPF dual flush | Compact 24½-inch length |
| Casta Diva Elongated Comfort-Height Toilet | Elongated bowl; 17-inch seat height | 1.1/1.6 GPF dual flush | Listed MaP score of 1,000 grams |
| DeerValley Elongated Standard-Height Toilet | Elongated bowl; 16⅞-inch seat height | 1.1/1.6 GPF dual flush | Listed MaP score of 800 grams |
| HOROW HR-ST076WD Compact Elongated Toilet | Elongated bowl; chair-height seating | 1.1/1.6 GPF dual flush | Removable soft-close seat |
| DeerValley Compact High-Efficiency Toilet | Round bowl; nearly 17-inch seat height | 0.8/1.28 GPF dual flush | Short 24.6-inch projection |
Our Picks: Best One Piece Toilet Bowl reviews
1. DeerValley Compact Round-Bowl Toilet: Best for Tight Spaces
This DeerValley model is the shortest option in the group at 24½ inches long. Its round bowl and standard seat height make it a practical choice when bathroom space matters more than an elongated bowl or taller seating position. The one-piece shape also gives it a clean, connected look.
The dual-flush system offers a 1.1 GPF option for liquid waste and a 1.6 GPF option for solid waste. The skirted exterior reduces exposed grooves, while the included soft-close PP seat is designed to shut quietly. The package lists a wax ring, bolts, wrench, and installation instructions, plus side-access panels intended to make plumbing access easier.
Compared with the elongated options here, this model gives up some bowl length and does not list a chair-height seat. The supplied details also do not state its rough-in measurement, so check that with the seller before buying. Its stated weight capacity is up to 250 pounds.
Pros:
- Compact 24½-inch length and round bowl
- Dual flush with 1.1/1.6 GPF options
- Skirted design and soft-close seat
- Installation hardware and tools are included
Cons:
- Standard seat height may feel low if you prefer chair-height seating
- Confirm the rough-in measurement before ordering
Verdict: Choose this DeerValley if you need a short, round-bowl toilet and want a dual-flush system, but verify its rough-in and make sure standard-height seating suits you.
2. Casta Diva Elongated Toilet: Best for Taller Seating
The Casta Diva pairs an elongated bowl with a 17-inch seat height, a combination that may suit people who prefer a higher sitting position. It measures 27.17 inches deep, 14.37 inches wide, and 25.39 inches high, so compare all three measurements with your bathroom layout rather than judging fit by bowl length alone.
Its dual-flush system uses 1.1 GPF for liquid waste and 1.6 GPF for solid waste. The product listing gives a MaP score of 1,000 grams and describes a siphon-jet flush with a fully glazed trapway. Those specifications make it the strongest stated flushing-test figure among these picks, though results in your home depend on proper installation and plumbing conditions.
The skirted exterior creates a more continuous surface to wipe down, and the included seat has a slow-close function and quick-release design. It is listed for a 12-inch rough-in and includes installation hardware. The trade-off is its longer bowl and higher seat, which may not suit every room or every user. The listing also states a one-year limited service period and lifetime technical consulting.
Pros:
- 17-inch seat height and elongated bowl
- Dual-flush 1.1/1.6 GPF system
- Listed MaP score of 1,000 grams
- Quick-release, slow-close seat and skirted sides
Cons:
- Elongated dimensions need more clearance than a compact round-bowl model
- The taller seat may not be right for every household
Verdict: The Casta Diva is a good fit to consider if you want an elongated bowl, a 17-inch seat, and the highest listed MaP score in this selection; first confirm that its dimensions work in your bathroom.
3. DeerValley Elongated Toilet: Best Standard-Height Option
This DeerValley model combines an elongated bowl with a standard seat height of 16⅞ inches. At 28.75 inches long, 14 inches wide, and 28 inches high, it is a larger choice than the compact round-bowl toilets in this list. The dimensions are worth checking carefully if your bathroom has limited front clearance.
The dual-flush system provides 1.1 and 1.6 GPF options, and the product listing gives it a MaP score of 800 grams. Its skirted sides and glazed surface are intended to make exterior cleaning easier. The ceramic is described as high-temperature fired, but the listing does not provide a specific warranty term, so check the seller’s current warranty information if coverage matters to you.
A 12-inch rough-in is specified, and the removable seat is designed to make cleaning and replacement easier. Compared with the Casta Diva, this toilet has a slightly lower listed seat height and a lower MaP score. It may be a better match if you want an elongated bowl without moving up to a 17-inch seat.
Pros:
- Elongated bowl with a standard 16⅞-inch seat height
- Dual-flush 1.1/1.6 GPF system
- Listed MaP score of 800 grams
- Skirted exterior and removable seat
Cons:
- Longer footprint needs more floor clearance than the compact models
- Warranty details are not specified in the supplied product information
Verdict: Consider this DeerValley if you want an elongated bowl with standard-height seating and a skirted exterior, and have enough room for its 28.75-inch length.
4. HOROW HR-ST076WD: Best Compact Elongated Pick
The HOROW HR-ST076WD is designed to combine an elongated bowl with a footprint aimed at smaller bathrooms. It measures 28.75 inches deep, 14 inches wide, and 28 inches high. That is not as short as the round-bowl choices, but the elongated shape may be worth the space trade-off if bowl comfort is a priority.
Its dual-flush system offers 1.1 GPF for liquid waste and 1.6 GPF for solid waste, with an average listed use of 1.28 GPF. The skirted trapway hides many exterior grooves, and the included PP seat has soft-close hinges and a removable design. The listing also gives this model a MaP score of 800 grams.
This toilet is made for a 12-inch rough-in. A pre-installed flush valve, seat, wax ring, floor bolts, and instructions are listed as included, though installation details should be checked before work begins. Compared with the DeerValley elongated model, the HOROW has similar listed dimensions and flush rates, but it specifically lists a removable soft-close seat and lifetime after-sales service with a one-year limited warranty.
Pros:
- Elongated bowl in a compact-style footprint
- Dual-flush 1.1/1.6 GPF system
- Removable soft-close seat
- 12-inch rough-in and key installation parts listed as included
Cons:
- Its 28.75-inch depth is longer than the round-bowl options
- Confirm clearance and rough-in before ordering
Verdict: The HOROW is a sensible option if you want an elongated bowl, dual flush, and a removable seat, provided its depth fits your bathroom.
5. DeerValley Compact High-Efficiency Toilet: Best for a Short Projection
This compact DeerValley is listed at 24.6 inches from the wall, making it one of the shortest options here. It uses a standard round bowl and has a seat height close to 17 inches, a useful combination if you want a compact footprint but do not want a low seat.
The toilet has a 0.8 GPF half flush and a 1.28 GPF full flush. That gives it the lowest listed flush volumes in this group. The skirted trapway and glazed surface are intended to simplify cleaning, while the removable soft-close seat uses stainless-steel hinges. A 12-inch rough-in is specified, and the package lists a water fitting, wax ring, floor bolts, and installation instructions.
Compared with the first DeerValley pick, this model uses less water per flush and has a higher seat, but its listed dimensions and included parts differ. The product information does not provide a MaP score, so there is less flush-test detail to compare with the other elongated models. Confirm that the seat and bowl shape suit your household before choosing it.
Pros:
- Short 24.6-inch projection for small bathrooms
- Lower 0.8/1.28 GPF dual-flush options
- Seat height close to 17 inches
- Removable soft-close seat and skirted trapway
Cons:
- Round bowl offers less front-to-back space than an elongated bowl
- No MaP score is listed in the supplied details
Verdict: Pick this model if minimizing projection and water use are top priorities, and a round bowl works for you.
How to Choose a One-Piece Toilet
Measure the Rough-In
The rough-in is the distance from the finished wall behind the toilet to the floor bolts that hold it in place. Several models here specify a 12-inch rough-in, but not every product detail lists this measurement. Measure your existing setup and compare it with the installation requirements for the toilet you are considering. Also check that baseboards or other obstacles will not affect the fit.
Check the Full Footprint
Length is only part of the fit. Compare the toilet’s listed width and height with the available space, and leave enough room in front of the bowl and around nearby fixtures. The compact round-bowl choices are about 24½ inches long, while the elongated options listed here are 27.17 to 28.75 inches long. Use the product’s stated dimensions to plan your layout.
Choose a Bowl Shape
A round bowl usually takes up less front-to-back space, which can help in a small bathroom. An elongated bowl has a longer seating area, but it needs more room. Think about who will use the toilet and whether preserving floor clearance or choosing a longer bowl matters more in your space.
Compare Seat Height
Standard-height seating may be comfortable if that is what you are used to, while a higher seat can make sitting down and standing up easier for some people. The options here range from standard height to about 17 inches. Check the listed seat height rather than relying on broad labels such as “comfort height,” and consider the height of the seat itself.
Understand the Flush Rates
GPF means gallons per flush. With a dual-flush toilet, the lower number is generally for liquid waste and the higher number for solid waste. A lower listed GPF can reduce water used per flush, but flush performance matters too. Where available, compare the stated MaP score as one data point, and follow the product’s installation and use instructions.
Consider Cleaning and Seat Features
A skirted exterior hides much of the trapway, which can reduce grooves and corners on the outside of the toilet. It does not remove the need to clean the bowl, seat, hinges, and floor around the base. A soft-close seat helps prevent slamming, while a removable seat can make cleaning or replacement more convenient.
Review What Comes in the Box
Included parts vary. Some of these toilets list a wax ring, floor bolts, a water fitting, tools, or installation instructions, while others include different combinations. Check the product listing for the exact package contents before starting installation. If you are not familiar with toilet installation, consider hiring a qualified professional.
Frequently Asked Questions
What is the main advantage of a one-piece toilet?
A one-piece toilet combines the tank and bowl into a single unit. This creates a continuous exterior without a separate tank-to-bowl connection, and skirted designs can have fewer exterior grooves to clean.
Is an elongated bowl better than a round bowl?
Neither shape is best for every bathroom. An elongated bowl provides a longer seating area but takes up more front-to-back space. A round bowl is often the more practical fit when floor space is limited.
What does GPF mean on a toilet?
GPF means gallons per flush. For a dual-flush model, the two numbers indicate the different flush options. Compare both numbers and check that the toilet’s listed flush performance meets your needs.
What does a MaP score tell me?
MaP is a toilet performance test that reports how much solid waste a model can remove under test conditions, in grams. It is useful for comparing listed test results, but it is not a guarantee of performance in every home.
Are skirted toilets easier to clean?
The smoother outer sides of a skirted toilet can make exterior wiping simpler by reducing exposed curves and grooves. You will still need to clean the bowl, seat, hinges, and floor around the toilet.
Do these toilets fit a 12-inch rough-in?
The Casta Diva, DeerValley elongated model, HOROW, and compact high-efficiency DeerValley specify a 12-inch rough-in in the supplied details. The first compact DeerValley listing does not state one, so confirm its requirement with the seller before ordering.
Which toilet is best for a small bathroom?
For the shortest listed projection, consider the compact round-bowl models: the first DeerValley is 24½ inches long, and the high-efficiency DeerValley is listed at 24.6 inches from the wall. Measure your room and compare the complete dimensions before deciding.
Final Recommendation
For a small bathroom, the DeerValley compact high-efficiency model stands out for its short projection, nearly 17-inch seat, and 0.8/1.28 GPF dual flush. If you prefer an elongated bowl, the HOROW HR-ST076WD offers a useful mix of compact styling, a removable soft-close seat, and dual-flush operation. Before buying any model, verify the rough-in, available clearance, bowl shape, seat height, and included installation parts.
