ShoeSize Calculator

Form

Results

Your ShoeSize

1

What is Shoe size?

Compare a foot-length measurement with the sizing system selected on the page.

2

How to Use This Calculator

  1. Enter or select Adult or Child, Foot Size.
  2. Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
  3. Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
3

Formula Used

Shoe size is obtained from the selected adult or child size chart.
4

Variables Explained

InputWhat it means
Adult or ChildUse the measured or stated value for this item, with the unit or category shown beside the field.
Foot SizeUse the measured or stated value for this item, with the unit or category shown beside the field.
5

Worked Example

A measured length should be compared with the chart’s foot-length column, not the shoe’s outside length.

6

Why Use This Calculator?

Use the formula and worked example to check the relationship between the input and output before carrying the result into a longer calculation.

7

Common Mistakes

    • Brands, lasts and regional systems differ; a converted number is a starting point for fit.
8

Frequently Asked Questions

Should I round numbers before calculating?

Keep the original input precision through the calculation and round the final answer to the precision you need. Rounding an intermediate result can change later steps.

Why can a manual calculation differ slightly?

Check the operation, units, signs and rounding first. Equivalent fractions or expressions can look different while representing the same value.

9

Sources & References