Shoe Size Conversion
Convert shoe sizes between US, UK, EU, Japan and foot length.
About Shoe Size Conversion
All shoe sizing systems trace back to foot length, measured by the Brannock device. Men's US sizes follow: US = (length_in_inches × 3) − 22; women's replace 22 with 20.5. EU (Paris points) is approximately US_men + 33 for men and US_women + 31 for women. UK is US − 1 for men and US − 2.5 for women. Japanese mondopoint is simply the foot length in millimetres rounded to the nearest 5.
Formula
US size from foot length
US size = (foot length in inches × 3) − 22 (men) or − 20.5 (women)
- L_in
- Foot length in inches
- C
- 22 for men, 20.5 for women
- S_US
- US shoe size
Worked example
With the default values below, Shoe Size Conversion returns US Men's Size of 10.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Genderone of Men's, Women's
- Men's
- Convert Fromone of US Size, UK Size, EU Size, JP (mondopoint mm), Foot Length (cm)
- US Size
- Size / Lengthaccepts 1–60
- 10
Results
- US Men's Size
- 10.0
- EU Size
- 43
- UK Size
- 9.0
- JP Mondopoint (mm)
- 270
- Foot Length
- 27.1 cm
- Foot Length
- 10.67 in
Step by step
- 1Resolve input to foot length= 27.1 cm
- 2Foot length in inches= 10.67 in
- 3US men's size= US 10
- 4EU size= EU 43
- 5UK size= UK 9
- 6JP mondopoint= JP 270
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
Why are men's and women's sizes different for the same foot?
US women's sizes run about 1.5 sizes larger than men's for the same foot length because they originated on separate lasts with different scale offsets. A woman's US 9 ≈ a man's US 7.5.
What does EU shoe size actually measure?
EU sizes use Paris points, where 1 Paris point = 2/3 cm. An EU 44 corresponds to a foot length of roughly 28 cm (44 × 2/3 − some offset for the last). The 'EU' system is also called 'Continental European' and is used across most of Europe.
Is JP shoe size the same as cm?
Very close — JP mondopoint is the foot length in millimetres rounded to 5 mm, so JP 270 means a 27 cm (270 mm) foot. It's one of the most intuitive systems because it directly measures the body.
My foot measures 26.8 cm — what size should I buy?
Enter 26.8 in the 'Foot Length (cm)' input. The calculator shows your US, EU, UK and JP sizes. When in doubt between two sizes, size up — especially for running shoes.