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When it comes to upgrading your bathroom, selecting the best one-piece toilet can make all the difference in style, efficiency, and ease of maintenance. One-piece designs blend the tank and bowl into a single seamless unit for a sleek look, fewer nooks for grime, and simplified installation. Whether you’re remodeling or simply replacing a worn-out unit, one-piece toilets deliver modern performance and aesthetic appeal.
Before choosing from the list below, consider key factors like water consumption (gallons per flush), bowl shape (elongated vs. round), seat height (standard vs. ADA), rough-in measurement, and extra features such as dual-flush mechanisms or soft-close seats. Matching these elements to your bathroom’s layout and your daily needs will ensure you get a toilet that performs well and complements your space.
Let’s get started!
Our Top Picks at a Glance
| Product | Best For | Buy Now |
|---|---|---|
| HOROW T0338W Compact One Piece Toilet | Overall Performance | Buy |
| Casta Diva Elongated One Piece Toilet (17.5″ ADA Comfort) | Best Efficiency | Buy |
| Casta Diva Elongated One Piece Toilet (17.2″ ADA, Button & Foot Kick) | Premium Flush Options | Buy |
Best One Piece Toilet
1. Best Overall: HOROW T0338W
- Compact One Piece Design: Measuring 26.6"D x 15"W x 26"H, this compact elongated toilet fits small bathrooms while still offering comfortable seating. The seamless one-piece design also creates a cleaner look and is easier to wipe down around the exterior.
- ADA Chair Height Comfort: Features a 17.3" seat height from floor to seat for a more comfortable chair-height experience. Designed to make sitting down and standing up easier for many adults, seniors, and users seeking added accessibility.
- Powerful Yet Water-Saving Flush: Built with siphon flushing and a fully-glazed 2" trapway to support strong waste removal. Dual flush options of 1.1/1.6 GPF help save water without giving up everyday performance.
The HOROW T0338W combines a sleek, compact one-piece design with ADA-compliant chair height for comfortable use. Its elongated bowl ensures a pleasant seating experience while the dual flush system offers 1.1 GPF for liquid waste and 1.6 GPF for solids, helping you save water without sacrificing performance. The skirted trapway makes cleaning a breeze, and the 12″ rough-in accommodates most bathroom layouts.
Constructed from durable vitreous china and finished in crisp white, this toilet resists scratches and stains. The seamless body prevents dirt buildup, and the slow-close seat eliminates slams for a whisper-quiet close. Whether you’re renovating a small powder room or upgrading a master bathroom, this model fits in tight spaces without looking out of place.
Installation is straightforward thanks to the universal rough-in and included mounting hardware. The high-efficiency flush quickly clears waste, and the ADA height supports accessibility needs. For those seeking a combination of reliability, style, and eco-friendly flushing, this model stands out as our top pick.
Pros
- Dual flush conserves water
- Skirted design for easy cleaning
- ADA chair height for comfort
Cons
- Requires 12″ rough-in
- Seat height may be too tall for children
2. Best Value: Casta Diva ADA 17″
- Luxurious Modern Toilet for Bathrooms: skirted 1-piece toilet integrates the tank and bowl into a seamless, easy-to-clean design, no leaking tank problem
- Powerful Siphon Flush Toilet: with a MAP rating of 1000, provides a powerful siphon jet flush performance, great performance flush score of 1000 grams and fully-glazed trapway bring a super quiet and powerful flush with no clogs
- Water Saving Performance: dual-flush option (1.1 GPF for liquids, 1.6 GPF for solids), meets EPA's WaterSense criteria for superb water conservation
The Casta Diva Elongated One Piece Toilet features a comfortable 17″ ADA-comfort chair height and a modern skirted design that hides trapways for easy cleaning. With a dual-flush option of 1.1/1.6 GPF, it delivers efficient flushing performance and meets high-efficiency requirements. The compact footprint and white finish integrate well into contemporary bathrooms.
Its elongated bowl enhances comfort during extended use, while the one-piece construction minimizes leaks and simplifies maintenance. The 12″ rough-in is compatible with most existing bathroom setups. Installation hardware is included, streamlining the replacement process.
Backed by a solid build and attractive pricing, this model gives you premium features at a mid-range cost. It’s an excellent solution for budget-conscious buyers who don’t want to compromise on design or functionality.
Pros
- Affordable dual-flush system
- ADA-comfort height
- Easy-to-clean skirted body
Cons
- Plastic flush buttons feel less durable
- No soft-close seat included
3. Best Designer Flush: St. Tropez Dual Vortex
- Dual Flush: The buttons for dual flush allow you to choose between a low 1.1 gpf light flush or a high 1.6 gpf full flush.
- Rough-In: Standard 12" Rough-In
- Standard Elongated Bowl: The elongated bowl provides extra room and comfort.
St. Tropez brings stylish simplicity and efficient performance with its One Piece Elongated Toilet featuring Dual Vortex™ flush technology. The dual-flush buttons allow 1.1 GPF for liquids and 1.6 GPF for solids, effectively clearing waste with minimal water usage. The white porcelain finish and black accent hardware create a striking contrast.
The elongated bowl enhances ergonomic comfort, while the one-piece design reduces crevices where dirt can hide. With a standard 12″ rough-in, installation is generally hassle-free, and the included mounting kit saves you extra trips to the store.
This model is ideal for those who want a unique, modern look paired with reliable flush mechanics. Its performance and aesthetics make it a favorite in both high-end and everyday bathroom renovations.
Pros
- Unique black hardware detail
- Powerful vortex flushing
- Easy-to-clean design
Cons
- No soft-close seat
- Slightly higher price point
4. Best Efficiency: Casta Diva ADA 17.5″
- 17.5" Comfort Height & Elongated Bowl: ADA Compliant Toilet, designed with an ergonomic comfort height seat 17.5" from floor to seat. Comfortable chair height makes sitting down and standing up easier, making it ideal for seniors and those needing a taller toilet
- Powerful Siphon Jet Flush: MAP 1000g, experience the reliability of a powerful siphon jet flush that achieves a MAP Flush 1000g. The fully-glazed, wide trapway ensures waste flows smoothly, offering a super quiet and powerful flush, one-flush clean, clog-free
- Water Saving Performance: Dual-flush system (1.0 GPF for liquids, 1.28 GPF for solids), meets EPA's WaterSense criteria for superb water conservation, Utilizing a high-efficiency 1.28 GPF flush provides significant water savings of up to 16,500 gallons per year compared to a 3.5-gallon toilet, without sacrificing performance
This Casta Diva one-piece toilet offers an elongated bowl at a comfortable 17.5″ ADA chair height. With ultra-efficient dual flush options of 1.0/1.28 GPF and a MaP score of 1000g, it meets stringent water-saving standards. The smooth skirted body hides trapways for effortless cleaning and a streamlined aesthetic.
Constructed from durable vitreous china, it features a 12″ rough-in for universal fit. The white gloss finish resists stains and discoloration, while the elongated bowl provides added seating comfort. Dual flush buttons sit flush on top of the tank for a minimalist look.
With exceptional water efficiency and performance, this toilet is perfect for eco-conscious homeowners. It balances high-end flushing technology with a modern design that complements any bathroom décor.
Pros
- Highly efficient 1.0/1.28 GPF flush
- Sleek skirted design
- High MaP score
Cons
- Flush buttons can stick if not cleaned
- Dual-flush mechanism is complex
5. Best Premium Flush: Casta Diva Button & Kick
- Air-Pressure Assisted Flush (1.0 GPF): designed with a built-in tank and air pressure-assisted system, patented system delivers a powerful and efficient flush - even in low-pressure environments
- Hands-Free Convenience: 1-piece toilet flush via foot-kick or side-button, ideal for hygienic and accessible use
- Non-Electric Required: features powerful flushing without the need for electricity, making it a great choice for bathroom renovations
The Casta Diva One Piece Toilet combines ADA comfort height (17.2″) with both push-button and foot-kick flush options for ultimate convenience. Its air pressure-assisted flush delivers powerful 1.0 GPF performance, while the modern skirted exterior ensures a seamless, easy-to-clean profile.
Finished in classic white, this model features a soft-close seat and 12″ rough-in compatibility. The dual flush modes allow quick liquid waste disposal and a stronger solid flush when needed. The integrated foot kick flush is a hygienic alternative when hands are occupied.
Built for luxury and functionality, this toilet is perfect for contemporary bathrooms seeking advanced flushing solutions and ADA compliance. Its high-quality construction guarantees years of reliable use.
Pros
- Foot kick and button flush
- Air pressure-assisted power
- Soft-close seat
Cons
- Higher price bracket
- Air-assist may require occasional maintenance
6. Best Budget: DeerValley DV-1F026
- Modern & Comfortable One-Piece Toilet: Dimensions: 28.75" L x 14" W x 28" H. Enjoy sleek style and superior comfort with this modern one-piece toilet. Featuring an elongated toilet bowl and a comfortable standard seating height 16 7/8", it's designed for a relaxing bathroom experience.
- Powerful Dual Flush: Our highly efficient 1.1 GPF/1.6 GPF dual flush toilet system delivers a powerful flush while conserving water. Save up to 16,500 gallons yearly vs. older 3.5 GPF models, making it a water-saving toilet for bathroom.
- Easy-Clean Skirted Design: The skirted toilet design eliminates hard-to-reach crevices, and the premium glazed surface resists stains, scratches, and yellowing. This one piece toilet is built to stay looking new.
The DeerValley One Piece Toilet offers a budget-friendly dual flush system (1.1/1.6 GPF) and a soft-close seat at a competitive price. The elongated bowl and standard height design suit most users, while the skirted exterior simplifies cleaning. A 12″ rough-in accommodates typical installations.
Crafted from durable ceramic, this model features a smooth white finish that resists staining. The powerful flush ensures efficient waste removal, reducing the likelihood of clogs. The soft-close lid prevents accidental slams.
Ideal for value-seekers, this toilet delivers essential features without breaking the bank. It’s a solid choice for rentals, guest baths, or anyone looking to refresh a bathroom affordably.
Pros
- Low-cost dual flush
- Soft-close seat
- Skirted trapway
Cons
- Basic design
- No ADA height option
7. Best Comfort: St. Tropez Comfort Height
- Dual Vortex Flush: Creating a cyclonic rinsing action that scrubs the bowl to ensure superior waste disposal using a minimum of 1.1 gallons per flush for water efficiency and maximum flush capacity of 1.6 gallons.
- Rough-In: Standard 12" Rough-In
- Standard Elongated Bowl: The elongated bowl provides extra room and comfort.
The St. Tropez Comfort Height One-Piece combines universal-height seating with a vortex dual-flush system (1.1/1.6 GPF). The elongated bowl and white hardware accents deliver a refined look, while the one-piece build minimizes leaks and eases cleaning.
With a 12″ rough-in, this toilet fits most existing plumbing configurations. The vortex flush technology generates a rotating water action that clears waste effectively. The comfortable seating height supports users of all ages and abilities.
Perfect for master bathrooms or en-suites, this model offers a blend of style and performance. Its mid-range price delivers premium features without exceeding most budgets.
Pros
- Vortex dual flush
- Comfort height seating
- Elegant hardware finish
Cons
- No soft-close seat included
- Flush handle can feel stiff
8. Best Compact: Sleek Modern Round
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This One Piece Sleek Modern Toilet features a compact, fully skirted round bowl and dual flush (0.9/1.28 GPF). At ADA chair seat height (17″), it balances comfort and space-saving design for small bathrooms. The soft-close seat and MAP 1000g rating underscore its quality.
The 12″ rough-in allows easy replacement, while the minimalistic profile suits modern interiors. Water-efficient flush modes help you meet conservation goals, and the seat’s gentle close protects against slamming.
Ideal for small or powder rooms, this model maximizes floor space without sacrificing functionality or comfort. Its clean lines and efficient performance make it a top pick for compact spaces.
Pros
- Extra-low 0.9 GPF setting
- Soft-close lid
- Compact footprint
Cons
- Round bowl offers less seating space
- Premium price for size
9. Best Soft Close: TOTO Ultramax®
- Elongated one-piece toilet, easier to maintain versus a two-piece toilet
- 1.28 gallons per flush with TORNADO FLUSH system for a powerful centrifugal rinse
- TOTO’s extraordinarily smooth CEFIONTECT glaze minimizes waste from sticking to porous, ceramic surfaces
The TOTO® Ultramax® One-Piece Elongated Toilet provides universal-height seating and a powerful 1.28 GPF flush. Featuring CEFIONTECT® ceramic glaze and an SS114 SoftClose® seat, it resists buildup and closes quietly. The streamlined design enhances modern bathrooms.
Designed for easy maintenance, the one-piece unit has fewer seams to trap grime. The Tornado Flush system creates cleaner bowl walls with every flush, while the universal rough-in ensures compatibility with most plumbing setups.
As a premium option, this model blends advanced technology with elegant styling. It’s well-suited for homeowners seeking a reliable, long-lasting toilet with superior glaze and quiet operation.
Pros
- CEFIONTECT® anti-stain glaze
- Quiet SoftClose® seat
- Powerful Tornado Flush
Cons
- Higher price point
- No dual-flush option
10. Best Modern Design: Elongated Soft Close
- Modern Toilets for Bathrooms: The SOTOMO elongated one-piece toilet ensures user comfort and modern simplicity, adding elegance to your home living. Measuring 28.4" x 15.5" x 26.6", it is suitable for various bathroom styles
- Map Flush 1000 Grams: Delivers the highest 1000g MaP rating, clearing waste in a single flush with professional-grade force. This compact elongated toilet stays clog-free with a fully glazed trapway, reduces odors and buildup, and maintains WaterSense efficiency while delivering a quiet, powerful flush every time.
- Powerful Dual Flush (1.1/1.6 GPF): The rimless tornado swirl clears waste fast while using less water. With an average of just 1.28 GPF, this compact elongated toilet can cut your water use by 20–30% a year—saving money while keeping every flush strong and reliable
This streamlined one-piece toilet offers an elongated bowl, soft-closing seat, and dual-flush 1.28 GPF. The fully skirted design measures 28.4 x 15.5 x 26.6 inches and fits a 12″ rough-in. White porcelain construction complements modern décor.
The dual-flush mechanism lets you choose between water-saving and powerful flush modes. The soft-close seat prevents slams, and the smooth sides make cleaning straightforward. Installation hardware is included for quick setup.
With its clean lines and reliable performance, this model suits bathrooms that favor contemporary aesthetics without sacrificing functionality.
Pros
- Soft-close seat included
- Attractive skirted look
- Dual-flush convenience
Cons
- No ADA height option
- Flush buttons can be stiff
11. Best Compact Comfort: Power Dual Flush
- [Modern Toilets for Bathrooms]: Full skirt design elongated one-piece toilet, not only is it beautiful and elegant, it's also easier to clean. Say goodbye to those ugly pipe curves of old-fashioned toilets! 27"D x 15 1/2"W x 26 1/8"H, this compact toilet saves space in the bathroom and provides more design possibilities.
- [One Piece Toilets with ADA Seat Height]: Meet ADA Compliant. Features 17.3"+ seat height from floor to seat. We have specially studied and tested the toilet sitting posture, and this height is most ergonomic and suitable for all people. The toilet with seat height will not put more pressure on your waist or knees, and it is more conducive to defecation.
- [Quite & Powerful Flushing Toilet]: Great Maximum Performance Flush score of 1000 grams, meets Water Sense criteria. 360-degree siphon flushing, unique pipe design, fully glazed trap-way, cUPC certified water fitting, these are all the essential factors for this toilet to achieve Map Score 1000g. No need to worry about clogging.
The Elongated One Piece Toilet with Comfort Chair Seat (ADA Height 17.33″) delivers powerful dual flush 0.8/1.28 GPF in a compact form. Rated MAP 1000g, it clears waste effectively. The white gloss finish resists stains, and the one-piece design seals out leaks.
At only 12″ rough-in, it installs easily in most bathrooms. The dual-flush mode lets you reduce water use for liquids, while the stronger flush handles solids. A comfortable chair height supports users with mobility needs.
For buyers seeking both space savings and efficient performance, this model offers a compelling balance of features at a mid-range price.
Pros
- Ultra-low 0.8 GPF flush
- High MaP score
- ADA-comfort height
Cons
- Flush buttons are small
- No soft-close seat
12. Best Smart: TDH Luxury Smart Bidet
- Strong Flush Technology: Our smart toilet delivers maximum cleaning power with an advanced vortex flushing system, using only 1.26 GPF for water efficiency. Emergency flush function ensures reliable operation even during power outages
- Oversized LCD Display: Toilet Bidet equipped with black screen clearly shows real-time temperature in Fahrenheit. Enjoy 4 levels adjustable heating temperature(seat & water) with constant warmth mode for personalized comfort
- Smart Sensor & Pre-Wetting: Tankless smart toilet features touch-free lid operation and auto-flush functions. For men and families, the foot sensor allows you to lift and close the seat and initiate a flush without bending or touching the toilet,reducing contact.Pre-wetting system keeps bowl cleaner longer
The TDH Luxury Smart Bidet Toilet integrates a one-piece design with heated bidet seating, LED display, auto flush, foot sensor operation, and night light. Its advanced controls let you customize water temperature, spray mode, and dryer settings. The integrated tank simplifies installation.
With a MAP 1000g rating and standard 12″ rough-in, this model performs as well as it pampers. The heated seat keeps you comfortable year-round, while the foot sensor allows hygienic flushing without touching buttons.
Ideal for tech enthusiasts and those seeking a spa-like bathroom experience at home, this smart toilet combines high-end features with a sleek one-piece silhouette.
Pros
- Heated bidet seat
- Auto open/close and flush
- Night light and LED display
Cons
- Requires electrical outlet nearby
- Higher maintenance complexity
13. Best Mid-Range: Casta Diva ADA 17 Compact
- Luxurious Compact Toilets for Bathrooms : skirted 1-piece toilet integrates the tank and bowl into a seamless, easy-to-clean design, no leaking tank problem
- Powerful Siphon Flush Toilet: with a MAP rating of 1000, provides a powerful siphon jet flush performance, great performance flush score of 1000 grams and fully-glazed trapway bring a super quiet and powerful high flush with no clogs
- Water Saving Performance: dual-flush option (0.9 GPF for liquids, 1.28 GPF for solids), meets EPA's WaterSense criteria for superb water conservation
This Casta Diva Elongated One Piece Toilet with a 17″ ADA comfort height seat offers dual flush 0.9/1.28 GPF and a 1000g MaP rating. The modern compact design fits in tighter spaces, while the skirted trapway enhances cleaning ease. Standard white finish and 12″ rough-in ensure broad compatibility.
The dual-flush buttons provide efficient liquid waste removal and solid waste clearing. The one-piece structure resists leaks, and the elongated bowl adds seating comfort. The included mounting hardware speeds installation.
As a mid-range offering, it balances price and performance for homeowners upgrading a guest bath or powder room.
Pros
- Balanced price-to-feature ratio
- ADA-comfort height
- Skirted design
Cons
- No soft-close seat
- Buttons can be hard to press
14. Best Two-Piece Alternative: TOTO Drake
- POWERFUL PERFORMANCE WITH LESS FREQUENT CLEANING - TORNADO FLUSH swirls water in a circular pattern to fully wash the bowl surface. CEFIONTECT is an ultra-smooth glaze that minimizes waste from sticking so that it is easily washed away..Trap Seal : 2-1/8". Minimum Water Pressure 8 psi (Flowing)
- MORE COMFORT ACROSS A WIDER RANGE OF INDIVIDUALS - TOTO's Universal Height is taller than a standard toilet and makes sitting down and standing up easier for many people. Universal Height models are capable of meeting the ADA height requirement.
- REDUCE WATER USEAGE WITHOUT SACRIFICE - The 1.6 gallon per flush Drake enables you to save water without worrying about diminished performance. The Drake features a wide 3 inch flush valve and a siphon jet bowl that gets the job done in one flush.
The TOTO Drake Two-Piece Elongated Toilet features Tornado Flush technology and CEFIONTECT® coating for powerful, cleaner rinsing with each 1.6 GPF flush. Universal height seating suits most users, and the elegant cotton-white finish complements diverse décor.
Although it’s a two-piece design, its sleek tank and bowl fit together seamlessly for an almost one-piece appearance. The elongated bowl enhances comfort, while the Tornado Flush reduces clogging. Installation is straightforward with a 12″ rough-in setup.
Perfect for those open to a two-piece option, the Drake offers a trusted TOTO flush system with ceramic glazing that resists debris buildup and staining.
Pros
- Powerful Tornado Flush
- CEFIONTECT® anti-stain glazing
- Universal height
Cons
- Not one-piece construction
- Higher water usage
15. Best Premium Smart: EPLO Smart Toilet
- Exceptional Flush Toilet - Featuring an industry-leading MaP flush performance score of 1000 grams, the EPLO U8MAX delivers powerful, consistent flushing that easily clears waste while using water efficiently. Engineered for strength without excess noise, it provides a smooth, quiet flush that keeps your bathroom clean, calm, and clog-free—day or night.
- Innovative Foam Shield for Splash Control - Creates a protective layer that helps prevent splashback, reduces waste sticking to the bowl, and keeps the toilet noticeably cleaner after every use. This smart design improves daily hygiene, reduces mess, and delivers a fresher, more comfortable bathroom experience.
- Upgraded Moving Air Dryer - Provides faster, more complete drying with adjustable temperature, wind speed, and position. Adds comfort after washing and helps reduce toilet paper use.
The EPLO Smart One Piece Elongated Toilet with built-in bidet offers features like auto open/close lid, heated seat, moving dryer, foam dispenser, and ADA comfort height. Its integrated tank system achieves a MaP score of 1000g, and the 12″ rough-in fits standard plumbing.
Fully automated flushing and a comprehensive control panel let you personalize your experience. The heated seat and built-in dryer eliminate the need for toilet paper, while the foam cleanser ensures a hygienic environment.
Though priced at the top end, this model is ideal for homeowners seeking a fully automated, luxury bathroom centerpiece with comprehensive smart functions.
Pros
- Full bidet and dryer suite
- Auto flush and lid operation
- Heated seat and foam dispenser
Cons
- Requires dedicated electrical outlet
- Complex installation process
Buying Guide
Water Efficiency
Look for toilets with low GPF ratings or dual-flush systems. Lower water usage saves on utility bills and conserves resources. Check MaP scores to ensure reliable waste removal.
Comfort & Height
Standard height (15″) vs. ADA/universal comfort height (17–19″). Taller bowls aid users with limited mobility, while standard heights may suit children better.
Flush Performance
Consider flush technologies like siphon jet, vortex, or pressure-assisted. Each impacts noise level, maintenance needs, and effective waste clearance.
Design & Installation
One-piece vs. two-piece: One-piece is sleeker and easier to clean but heavier to install. Verify 10″, 12″, or 14″ rough-in measurements to match existing plumbing.
Price & Warranty
Toilets range from budget basic models to high-end smart units. Compare warranty terms: longer coverage often indicates manufacturer confidence in durability.
Frequently Asked Questions
What is the difference between one-piece and two-piece toilets?
One-piece toilets have the tank and bowl molded together, creating a seamless design that’s easier to wipe clean and less prone to leaks. Two-piece toilets separate the tank and bowl, which can be lighter to handle but have more crevices for grime.
How do dual-flush systems work?
Dual-flush toilets offer two flush options: a partial flush (typically around 0.8–1.1 GPF) for liquid waste and a full flush (1.6 GPF or less) for solids. This choice helps conserve water while maintaining cleaning power.
What is a rough-in measurement?
The rough-in is the distance from the finished wall to the center of the floor drain (waste outlet). Common sizes are 10″, 12″, or 14″. Choosing the correct rough-in ensures a proper fit without plumbing modifications.
Are smart toilets worth the investment?
Smart toilets provide advanced hygiene features—heated seats, bidet functions, auto flush, and more—but they come at a higher cost and often require electrical work. If you value convenience and luxury, they can be a justified upgrade.
Conclusion
Choosing the Best One Piece Toilet for your home depends on your budget, space constraints, and desired features. From budget-friendly dual-flush models to high-end smart bidets, today’s one-piece toilets offer superior performance, easy maintenance, and stylish designs. We hope this guide helps you find the perfect toilet to upgrade your bathroom experience.