Everflowbidets Bidet Seat Fitment

Bidet Toilet Seat Compatibility Guide

Bidets can be used either after or instead of toilet paper for everyday use, and can be beneficial to those with certain medical conditions or recovering from childbirth. Since they allow a homeowner to cut back on paper and water usage, bidets are also seen as an eco-friendly addition to a bathroom.  This guide will help you understand the different bidets types and features so that you can pick the best bidet to meet your needs.

There are two main types of toilet bowls: elongated and round. Older and more basic toilets are round, while more modern, deluxe toilets have an elongated bowl.

Elongated toilets are more oval-shaped than round, as shown in the diagram below. If you're uncertain about which type you have – here’s how to measure your toilet for a bidet seat or attachment:

  • To measure the length of the bowl, locate the two mounting bolts at the seat hinge. From there, measure to the very front of the toilet bowl in a straight line. That straight line measurement will be about 16-1/2 inches if the bowl is round, and 18-1/2 inches if your bowl is elongated.
  • You'll also need to measure the distance between the toilet bolt holes.  Any distance shorter than 5.5 inches or greater than 7.5 inches will likely be incompatible.
  • The last measurement you’ll need to confirm is the distance between the bolt holes and the toilet tank, which should be no less than 1.5 inches.


Check to see if your toilet is round or elongated.
Check your compatibility measurements.
Back to blog