Foot Length Shoe Size Converter
Convert foot length into approximate men’s US, women’s US, UK, EU and Japan references.
Last updated · View algorithm, constants and default inputs (JSON)
US men
About this calculator
This converter applies simplified length-based formulas: Japan follows the entered length in centimetres, while US, UK and EU values are estimates. It is not an official universal crosswalk. ISO 19407:2023 treats foot-length conversion tables as guidance because regional sizing systems differ. Check the specific shoe maker’s chart.
Choose the calculation that matches your task
This converter starts with foot length and reports men’s, women’s and regional size estimates. It does not use foot width. If you also want the separate model’s width indicator and selected sizing profile, use the size-and-width estimator.
Worked example
calculated with the default values below
Measurement unit Centimetres · Foot length (selected unit) 25 US men 7.5 · US women 8.5 · UK 6.5 · EU 39.5 · Japan / cm 25.0 · Foot length 9.84 in
General background references
Disclaimer
These calculators give general estimates. Sizing, pricing, availability and standards vary by brand, retailer and country, so treat the output as a starting point and confirm it against the seller's or authority's own figures.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
US_M = 3c÷2.54 − 22; US_W = 3c÷2.54 − 21; UK = 3c÷2.54 − 23; EU = 1.5c + 2; JP = c
- c
- Foot length (cm)
- US_M
- US men estimate
- US_W
- US women estimate
- UK/EU/JP
- Approximate size references
c is foot length in centimetres. Results are simplified estimates, not a universal conversion chart; check the shoe maker’s chart.
Frequently asked questions
How are the shoe-size results estimated?
The formulas use foot length in centimetres: Japan follows the centimetre value, while US and UK estimates use inch-based linear formulas and EU uses 1.5 × centimetres + 2. These are simplified references, not a universal chart; compare them with the shoe maker’s guide.