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A Guide on How to Measure a Toilet

A Guide on How to Measure a Toilet

When searching for a new toilet, it's crucial to consider its size and dimensions. Our guide provides insights into the factors affecting standard toilet dimensions, guidance on how to measure a toilet, and tips on using this information for a seamless installation and bathroom layout.

Toilet Bowl Shapes:

  • Elongated: This bowl design, resembling a pear shape, offers added comfort and is typically 2-3 inches longer than a round bowl.
  • Round: Circular in design, this bowl shape requires less space, making it an ideal choice for compact bathrooms.

Seat Heights:

Seat height, measured from the floor to the top of the toilet seat, should be chosen based on your height and physical needs.

  • Standard: Typically 15-17" off the ground, these toilets are common in most households and ideal for homes with children.
  • Chair: Ranging from 17-19" off the ground, chair-height toilets offer extra comfort and are suitable for those with limited mobility.

How to Measure a Toilet:

The crucial step in buying a new toilet involves ensuring it fits your space. Use a tape measure for the following measurements:

  • Toilet Height: Measure from the floor to the top of the seat and the tank to ensure it fits the space.
  • Toilet Depth: Measure from the front of the rim to the back, leaving at least 24" of space in front for ease of movement.
  • Toilet Width: Measure from the left to the right edge of the tank or seat, ensuring at least 30" of space.


The key dimension when buying a toilet is the rough-in measurement, which is the distance between the closet bolts and the wall. Measure from the back wall to the center of one rear closet bolt. The standard rough-in is 12 inches, but it may vary between 10 and 14 inches.

Standard Toilet Dimensions:

Typically, standard toilets are between 28-30" deep, roughly 20" wide, 27-32" high, with a rough-in between 10-14"

In summary, choosing the right toilet involves considering bowl shapes, seat heights, and accurate measurements. This guide ensures an informed decision for a comfortable and efficient home.
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