Select your gender and enter the total measurement of your foot in inches into the calculator. The calculator will evaluate your shoe size based on the length of your foot and sex.
Shoe Size Formula
The following three formulas are used to calculate your shoe size based on your foot length.
USM= (3 * L) – 22
USF= (3 * L) – 21
USC= (3 * L) – 9.67
- Where L is length in inches
- USM is men’s size
- USF is females size
- USC is childrens size
Shoe Size Definition
A shoe size is a standard way of displaying the length of a shoe so that people can more easily understand the proper size to use for their foot.
Shoe Size Example
How to calculate shoe size
- First, measure your foot
Measure the length of your foot from heal to toe in inches.
- Select the proper formula
Select the correct formula from above based on your gender.
- Calculate your shoe size
Using the length of your foot and inches, and the equation above, calculate your proper shoe size.
A shoe size is a standard measure of unit used for estimating the size of a shoe. The reason for shoe sizes is so that individuals can purchase shoes that will fit there foot as best as possible.