Toilets

Common plan drawing of a standard toilet bowl fixture

Toilets are bathroom fixtures used for the sanitary collection and disposal of human waste products such as urine and feces. Consisting of a bowl and seat, toilets provide hygienically safe and convenient facilities for relieving ourselves. Toilets come in a variety of disposal methods that range from common flush toilets, dry toilets, and vacuum toilets to pit latrines, portable toilets, and chemical toilets. Toilet bowls are typically made of ceramic (porcelain) but other disposal designs may be made from concrete, plastic or wood. Toilet manufacturers also offer diverse options for seat styles and bowl design along with new possibilities to integrate technology into the toilet that may improve your experiences. The most common toilet design variations are two-piece, one-piece, and wall-hung toilets.

Common Questions

How big is a typical toilet?
Toilets are designed and manufactured in a range of sizes and styles with typical depths between 27”-30” (69-76 cm), widths around 20” (51 cm), and back heights from 21”-31” (53-79 cm).
How tall is the toilet seat from the floor on an ADA compliant toilet?
The distance measured to the top of the toilet seat, not the bowl height, must be between 17”-19” (43.1-48.3 cm) to be ADA compliant. Before recently, most standard toilets were manufactured to be 15” (38.1 cm) in height which does not meet accessibility requirements.
What is the rough-in measurement of a standard toilet?
The Rough-In measurement of a toilet refers to the distance from the back wall to the center of the drainpipe at the base of a standard toilet. The rough-in measurement of a standard toilet design is typically 12” (30.5 cm).

* Under Development *

Toilet Clearances
Toilet and water closets (WCs) clearances can be measured from the face of the fixture or from its center line. Minimum clearances between the face of the toilet fixture and the wall or nearest obstruction element are at least 24” | 61 cm* but are recommended to be 36” | 91 cm.
Drawings of Toilet Clearances illustrated in side elevation and plan with dimensions
Toilet and water closets (WCs) clearances can be measured from the face of the fixture or from its center line. Minimum clearances between the face of the toilet fixture and the wall or nearest obstruction element are at least 24” | 61 cm* but are recommended to be 36” | 91 cm.
Drawings of Toilet Clearances illustrated in side elevation and plan with dimensions
Toilet Clearances

*Under Development*

To front obstruction (minimum): 24” | 61 cm
To front obstruction (recommended): 36” | 91 cm
To side wall (from face): 12” | 30.5 cm min.
To side wall (from center): 22” | 56 cm min.
Toilet paper from floor: 30” | 76 cm
Toilet paper reach (from face): 12” | 30.5 cm

Drawings include:
Toilet Clearances side elevation, plan

Details & Downloads
Two-Piece Standard Toilet
Two-Piece standard toilets are the most common household toilet based on the aesthetics and proportions of earlier toilets. Two-piece standard toilets are commonly sized at a depth of 28” | 710 mm, width of 19 1/2” | 494 mm, tank height at 28 1/2” | 724 mm, and seat height of 15 5/8” | 398 mm.
Measured drawings of a Two-Piece Standard Toilet from the side, front, back and plan
Two-Piece standard toilets are the most common household toilet based on the aesthetics and proportions of earlier toilets. Two-piece standard toilets are commonly sized at a depth of 28” | 710 mm, width of 19 1/2” | 494 mm, tank height at 28 1/2” | 724 mm, and seat height of 15 5/8” | 398 mm.
Measured drawings of a Two-Piece Standard Toilet from the side, front, back and plan
Two-Piece Standard Toilet

*Under Development*

Width: 19 1/2” | 494 mm
Depth: 28” | 710 mm
Height (Seat): 15 5/8” | 398 mm
Height (Tank): 28 1/2” | 724 mm

Drawings include:
Two-Piece Standard Toilet side elevation, front, plan (open), plan (closed)

Details & Downloads
Two-Piece Low Back Toilet
Two-piece low-back toilets are efficient common commercial toilets with lower tank heights for a more reduced presence. Two-piece low-back toilets have a typical depth of 28 1/2” | 724 mm, width of 15” | 382 mm, tank height at 30” | 761 mm, and seat at 16 1/8” | 410 mm.
Dimensioned drawings of a Two-Piece Low Back Toilet showing the side, front, and plan
Two-piece low-back toilets are efficient common commercial toilets with lower tank heights for a more reduced presence. Two-piece low-back toilets have a typical depth of 28 1/2” | 724 mm, width of 15” | 382 mm, tank height at 30” | 761 mm, and seat at 16 1/8” | 410 mm.
Dimensioned drawings of a Two-Piece Low Back Toilet showing the side, front, and plan
Two-Piece Low Back Toilet

*Under Development*

Width: 15” | 382 mm
Depth: 28 1/2” | 724 mm
Height (Seat): 16 1/8” | 410 mm
Height (Tank): 30” | 761 mm

Drawings include:
Two-Piece Low Back Toilet side elevation, front, plan (open), plan (closed)

Details & Downloads
Two-Piece Modern Toilet
Two-piece modern toilets are upgrades to the standard two piece toilet that are shaped more elegantly while also providing less surfaces for dirt to collect on. The two-piece modern toilet has a width of 15 9/16” | 395 mm, depth of 27 9/16” | 700 mm, and overall tank height of 29 9/16” | 751 mm.
Measured drawings of a Two-Piece Modern Toilet with dimensions on the side, front, and plan
Two-piece modern toilets are upgrades to the standard two piece toilet that are shaped more elegantly while also providing less surfaces for dirt to collect on. The two-piece modern toilet has a width of 15 9/16” | 395 mm, depth of 27 9/16” | 700 mm, and overall tank height of 29 9/16” | 751 mm.
Measured drawings of a Two-Piece Modern Toilet with dimensions on the side, front, and plan
Two-Piece Modern Toilet

*Under Development*

Width: 15 9/16” | 395 mm
Depth: 27 9/16” | 700 mm
Height (Seat): 15 9/16” | 395 mm
Height (Tank): 29 9/16” | 751 mm

Drawings include:
Two-Piece Modern Toilet side elevation, front, plan (open), plan (closed)

Details & Downloads
One-Piece Standard Toilet
One-piece standard toilets are streamlined common toilets that are smaller and easier to clean than similar two-piece standard toilets. One piece standard toilets have a typical depth of 28 1/4” | 719 mm, width of 16 1/2” | 419 mm, tank height at 28 3/4” | 729 mm, and seat at 16 1/8” | 410 mm.
Multiple illustrations of a One-Piece Standard Toilet with dimensions documented on side, front, and plan views
One-piece standard toilets are streamlined common toilets that are smaller and easier to clean than similar two-piece standard toilets. One piece standard toilets have a typical depth of 28 1/4” | 719 mm, width of 16 1/2” | 419 mm, tank height at 28 3/4” | 729 mm, and seat at 16 1/8” | 410 mm.
Multiple illustrations of a One-Piece Standard Toilet with dimensions documented on side, front, and plan views
One-Piece Standard Toilet

*Under Development*

Width: 16 1/2” | 419 mm
Depth: 28 1/4” | 719 mm
Height (Seat): 16 1/8” | 410 mm
Height (Tank): 28 3/4” | 729 mm

Drawings include:
One-Piece Standard Toilet side elevation, front, plan (open), plan (closed)

Details & Downloads