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Shoe size calculator

Alternative name: Shoe size converter

Use this shoe size calculator if you want to find your shoe size based on the length of your foot. When measuring your foot, make sure that you use the longest measurement when calculating your shoe size. This means that you should measure from the heel to the big toe. The shoe sizes calculated are listed in US, Canadian, Australian, and European sizes.

If you select an option that has the same underlying value as another option, both (all) will be marked.

Results

Length in inches: 30
US male shoe size: 68
US female shoe size: 69
US child shoe size: 80.33
UK Adult shoe size: 67
UK child shoe size: 80.33
European shoe size: 116.2

Shoes are primarily available in 0.5 increments. This means that the shoe size listed here should be rounded to a size you feel is comfortable on the foot.


Our calculations

At Calculatorian, we are keen to share our knowledge, be transparent and open to feedback. Here are the calculations used to create this calculator. If you find an error or deficiency, contact us and we'll fix it in an instant!

Length in inches was calculated like this:

US male shoe size was calculated like this:

US female shoe size was calculated like this:

US child shoe size was calculated like this:

UK Adult shoe size was calculated like this:

UK child shoe size was calculated like this:

European shoe size was calculated like this:

Variables used in this formula

l = Length of foot

Depending on your choice when selecting are measuring your foot in inches or centimeters? a constant is applied as the variable s in the formula.

Are measuring your foot in inches or centimeters?s
Centimeters2.54
Inches1