Japan Shoe Size Converter
Measure the longer foot in centimeters and choose the relevant fit profile. The Japanese result stays anchored to centimeters; overseas labels are planning estimates because lasts, widths, and brand charts differ.
Shopping estimate only. Japanese sizing is anchored to foot length in centimeters, but a labeled shoe size is not a guarantee of fit. US, UK, and EU conversions are approximate and can differ by brand, model, width, socks, foot shape, and whether a chart describes foot length or the shoe last.
Enter your scenario
Use the details that match your situation. Your estimate stays in this browser.
How this estimate works
- The Japanese planning size is the measured foot length rounded to the nearest half-centimeter planning increment.
- The selected men's or women's profile applies conventional arithmetic approximations for US and UK labels and a Paris-point approximation for EU sizing.
- The result keeps the original centimeter measurement visible and tells the shopper to prefer the brand's own chart and an in-person fit check.
Official footwear and fit references
- METI: Japanese footwear market and JIS size coverage
- National Center for Global Health and Medicine: shoe size and manufacturer fit vary
Japanese ready-made footwear commonly uses half-centimeter product increments, while fit depends on more than the printed length. The calculator intentionally labels all overseas conversions as approximate.
Frequently asked questions
Is a Japanese shoe size the same as foot length in centimeters?
Japanese labels are centimeter-based, but the best labeled size can still differ from the raw foot measurement because shoes need allowance and each last has a different shape.
Why are the US, UK, and EU results approximate?
There is no single universal brand-to-brand conversion. Gender profile, shoe construction, width, and the manufacturer's last can shift the best fit even when the printed label is the same.
What should I do if my feet have different lengths?
Use the longer foot for the initial size and confirm width and heel fit using the manufacturer's chart or an in-person fitting.