3 Best Black Toilets, Compared

Quick picks

The best fit for you

• You have a 10-inch rough-in bathroom space Swiss Madison St. Tropez Glossy Black This Swiss Madison model features a 10-inch rough-in size for tight fits.
• You need ADA height for accessibility Casta Diva Black One-Piece Toilet The Casta Diva offers an ADA chair height seat for easier use.
• You want the most compact width available Casta Diva Black One-Piece Toilet Its 14.4-inch width is the narrowest footprint on this list.

Our 3 picks

1 Best overall

Swiss Madison St. Tropez Glossy Black

Best for: water-efficient 10-inch rough-in installs

Color

Black (what this guide is about)

Flush Type

Dual Vortex Flush

Flush Volume

1.1/1.6 GPF

Rough-In Size

10"

Seat Height

17-19 inches

Bowl Shape

elongated

View on Amazon: Swiss Madison St. Tropez Glossy Black Affiliate link

This Swiss Madison one-piece toilet features a glossy black finish and an elongated bowl. It offers a dual vortex flush system with 1.1 or 1.6 gallons per flush. The comfort height seat sits between 17 and 19 inches. A fully glazed trapway helps prevent clogs. The soft-close seat adds quiet operation. It fits 10-inch rough-in installations. This model suits those seeking efficient water use and a modern dark aesthetic.

Pros

• Dual vortex flush uses as little as 1.1 GPF
• Comfort height seat ranges from 17 to 19 inches
• Fully glazed trapway reduces clogging risk
• Soft-close seat prevents slamming noise

Cons

• Heavy at 108 pounds
• Limited to 10-inch rough-in size
• Glossy finish may show water spots

Good fit if

• You need a 10-inch rough-in toilet
• You prefer a comfort height seat
• You want a water-efficient dual flush system

Skip if

• You require a 12-inch rough-in
• You prefer a matte black finish
• You need a standard height seat

Verdict: Swiss Madison St. Tropez Glossy Black delivers efficient flushing and durable construction for standard 10-inch rough-in bathrooms. It fits users who value water savings and easy cleaning in a compact one-piece design.

2 Best premium

Casta Diva Black One-Piece Toilet

Best for: Black bathrooms needing ADA height

Color

Black (what this guide is about)

Flush Type

Dual flush, siphon jet

Flush Volume

1.1/1.6 GPF

Rough-In Size

12"

Seat Height

17"

Bowl Shape

Elongated

View on Amazon: Casta Diva Black One-Piece Toilet Affiliate link

This black one-piece toilet features an elongated bowl and a 17-inch ADA-compliant seat height. It uses a dual-flush system rated at 1.1 and 1.6 GPF to save water. The siphon jet flush achieves a MaP score of 1000 grams for strong waste removal. The unit includes a soft-close seat and a skirted design for easy cleaning. It fits standard 12-inch rough-ins.

Pros

• Skirted one-piece design for easy cleaning
• Dual-flush options at 1.1 and 1.6 GPF
• MaP flush score of 1000 grams
• 17-inch ADA comfort height seat

Cons

• Heavier at 90 pounds
• Standard 12-inch rough-in only
• Includes white tank cover

Good fit if

• You want a black toilet with a sleek look
• You need an ADA-compliant seat height
• You prefer a low-maintenance skirted design

Skip if

• You require a 10-inch rough-in
• You need a non-skirted bowl
• You want a taller seat height

Verdict: Casta Diva Black One-Piece Toilet offers a strong flush and modern look for those prioritizing water efficiency and accessibility. It suits bathrooms needing a 12-inch rough-in and a comfortable seat height.

3 Best budget

Lamanelle Black One-Piece Toilet

Best for: Accessible, water-saving bathroom upgrades

Color

Black (what this guide is about)

Flush Type

Dual flush

Flush Volume

0.8/1.28 GPF

Rough-In Size

12"

Seat Height

17.4"

Bowl Shape

Elongated

View on Amazon: Lamanelle Black One-Piece Toilet Affiliate link

This black, one-piece toilet features an elongated bowl and a 17.4-inch ADA comfort height seat. It uses a dual-flush system with 0.8 GPF for liquids and 1.28 GPF for solids. The siphon jet flush has a MAP rating of 1000. It includes a soft-close seat and quick-release hardware. The design is compact, measuring 28.5 inches in depth. It suits users who want water efficiency and easy installation.

Pros

• Dual-flush system saves up to 16,500 gallons annually
• MAP rating of 1000 for powerful siphon flush
• 17.4-inch ADA comfort chair height seat
• Soft-close seat with quick-release hinges
• Fully-glazed trapway reduces clogs

Cons

• Deeper profile at 28.5 inches may not fit small spaces
• Standard 12-inch rough-in limits placement flexibility
• Limited color options in this specific model line

Good fit if

• You need an ADA-compliant seat height for accessibility
• You want a water-efficient toilet with a 1.28 GPF flush
• You prefer a sleek, one-piece design with a soft-close seat

Skip if

• You have a bathroom with less than 28 inches of depth
• You require a standard 15-inch rough-in configuration
• You prefer a two-piece toilet design for easier transport

Verdict: Lamanelle Black One-Piece Toilet offers a high-efficiency flush and accessible height for users prioritizing water conservation and comfort. It is ideal for modern bathrooms where space allows for its deeper footprint.

Specifications side by side

How to choose the right one

1. Check one-piece design

   All three models feature a one-piece design. This construction merges the tank and bowl into a single unit. You benefit from fewer seams and easier cleaning. The glossy black finish remains smooth without crevices for grime. Swiss Madison, Casta Diva, and Lamanelle all use this approach. You avoid the separate tank installation step. This design also creates a streamlined look in small bathrooms. Verify the finish quality matches your durability needs.

2. Verify elongated bowl shape

   Each listed toilet uses an elongated bowl shape. This shape extends further than round bowls. You gain more comfort for daily use. The elongated design also improves flushing performance. Swiss Madison, Casta Diva, and Lamanelle all feature this shape. You must ensure your bathroom has enough clearance. Elongated bowls require more floor space. Measure the distance from the wall to the front. This shape suits most users seeking comfort and efficiency.

3. Compare overall dimensions

   Size varies across the three models. You must measure your available floor space carefully. Swiss Madison measures 27.5 inches in length. Casta Diva is slightly shorter at 27.2 inches. Lamanelle extends to 28.5 inches in depth. Widths also differ slightly, ranging from 14.4 to 15.5 inches. You need adequate clearance for the lid and seat. Check the height specifications for comfort. Proper sizing prevents installation issues and ensures a good fit.

4. Consider ADA seat height

   Accessibility matters for many users. Casta Diva and Lamanelle offer ADA chair height seats. This height is approximately 17 to 19 inches. You find it easier to sit and stand. Swiss Madison does not list ADA height in its specs. You should check its 31.5-inch total height. ADA-compliant models suit elderly users or those with mobility issues. Verify the seat height specification before purchasing. This feature significantly impacts daily comfort and safety.

5. Match rough-in requirements

   Rough-in size is critical for installation. You must measure the wall to the flange bolts. Swiss Madison requires a 10-inch rough-in. Casta Diva and Lamanelle need the standard 12-inch spacing. A mismatch prevents proper installation. You cannot adjust the rough-in size easily. Check your bathroom layout before buying. This specification determines if the toilet fits your space. Always verify this measurement to avoid returns or modifications.

Frequently asked questions

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