Shoe Size Converter
Convert shoe sizes between US, UK, EU and Japanese (cm) sizes for men, women and kids using standard published size charts — e.g. US men's 10 = UK 9.5 = EU 44.
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What this tool does
Convert shoe sizes between US, UK, EU and Japanese (cm) sizes for men, women and kids using standard published size charts — e.g. US men's 10 = UK 9.5 = EU 44. Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
How to use the Shoe Size Converter
- Enter or select who are the shoes for?.
- Enter or select size system of the size you have.
- Enter or select size to convert.
- Read the calculated result; change any measurement to compare alternatives.
Formula
Chart lookup: find the row whose selected-system value is nearest to the entered size, then read the equivalent sizes in every system from that row (src/data/sizes.ts).
- group
- Who are the shoes for?
- from
- Size system of the size you have
- value
- Size to convert
Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
Worked example
For shoe size converter, the following measurements illustrate the exact method: Who are the shoes for?: men; Size system of the size you have: us; Size to convert: 10.
Inputs
- Who are the shoes for?Men
- Size system of the size you haveUS
- Size to convert10
Result
- US size10
- UK size9.5
- EU size44
- JP size / foot length (cm)28
- Foot length (inches)11.02
Men's shoe size chart (consensus)
| US | UK | EU | JP (cm) |
|---|---|---|---|
| 6 | 5.5 | 38.5 | 24 |
| 6.5 | 6 | 39 | 24.5 |
| 7 | 6.5 | 40 | 25 |
| 7.5 | 7 | 40.5 | 25.5 |
| 8 | 7.5 | 41 | 26 |
| 8.5 | 8 | 42 | 26.5 |
| 9 | 8.5 | 42.5 | 27 |
| 9.5 | 9 | 43 | 27.5 |
| 10 | 9.5 | 44 | 28 |
| 10.5 | 10 | 44.5 | 28.5 |
| 11 | 10.5 | 45 | 29 |
| 12 | 11.5 | 46 | 30 |
| 13 | 12.5 | 47.5 | 31 |
Results explained
- US size
- US size from the formula above. Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
- UK size
- UK size from the formula above. Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
- EU size
- EU size from the formula above. Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
- JP size / foot length (cm)
- JP size / foot length (cm) from the formula above. Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
- Foot length (inches)
- Foot length (inches) from the formula above. Brand-neutral consensus chart (Nike/adidas-style published conversions). Brands differ by up to half a size and lasts differ by style, so treat results as the standard equivalent, not a fit guarantee. Kids' US sizes 10-13 are C sizes; 1-7 are Y (youth).
Frequently asked questions
EU 44 and UK 9.5 on standard conversion charts, with a Japanese size of 28 cm. This is the most common men's conversion and the row this converter is checked against.
There is no single enforced worldwide standard: brands build on different lasts and round differently, so equivalents vary by up to half a size. Use the chart value as your starting size and prefer foot length in cm for the closest match.
Stand on paper in socks, mark heel and longest toe, and measure in cm. Japanese sizes are simply that foot length in cm, which is why the cm column doubles as the JP size.
US kids' sizes run 10C-13C (child), then restart at 1Y-7Y (youth) before adult sizing. A size 1 without the Y is a youth size, not a toddler size — the group selector keeps the tables separate.
No. Women's US-UK offset is about 2-2.5 (US 8 = UK 6.5) versus about 0.5-1 for men (US 10 = UK 9.5), and EU offsets differ too — always pick the right group before converting.