Shoe Size Converter
Convert any adult shoe size between US, UK, EU and Japanese (Mondopoint, cm) sizing. Pick your style (men’s/unisex or women’s), choose the region you know, and the calculator shows the equivalents in every other region plus an estimated foot length.
Men's / Unisex US 10 converts to
UK 9.5 · EU 43 · JP (cm) 28
- US
- 10
- UK
- 9.5
- EU (Paris point)
- 43
- JP / Mondopoint (cm)
- 28
- Approximate foot length
- 280 mm / 28.0 cm / 11.02 in
Conversion uses the Brannock/Mondopoint adult cross-reference table (Brannock Device specification + ISO/TS 19407). Brand variance of ±0.5 sizes is normal — always check the maker’s own chart before buying, especially for narrow-fit European brands and athletic shoes.
How to use this calculator
Select whether the size you are converting is a men’s/unisex size or a women’s size — the two scales differ. Choose the region the size is in (US, UK, EU, or Japan/cm). Type the size, including a half-step like 9.5 if needed. The calculator shows the equivalent in every other region and an approximate foot length in mm, cm and inches. For kids, use a kids-specific chart instead — children’s lasts are proportioned differently.
How the calculation works
The calculator uses a cross-reference table anchored on two industry standards: the Brannock Device specification (the US standard for shoe lasts, where one full size equals one-third of an inch / 8.47 mm of last length) and ISO/TS 19407, the Mondopoint system that expresses size as foot length in millimetres. Within the standard adult range, men’s sizing follows UK = US − 0.5, EU = US + 33, JP/cm = US + 18; women’s sizing follows UK = US − 2, EU = US + 31, JP/cm = US + 17. Real-world brand variance of ±0.5 sizes is normal, particularly for athletic and narrow-fit European brands, so always cross-check the maker’s own chart before buying.
Worked example
A men’s US 10 shoe. Reading down the men’s table: UK = 10 − 0.5 = 9.5; EU = 10 + 33 = 43; JP/Mondopoint = 10 + 18 = 28 cm; foot length ≈ 280 mm (28.0 cm / 11.02 in). A women’s US 7: UK = 7 − 2 = 5; EU = 7 + 31 = 38; JP = 7 + 17 = 24 cm; foot length ≈ 240 mm (24.0 cm / 9.45 in). These match the published Brannock and major-retailer charts to within the usual ±0.5-size brand variance.
Frequently asked questions
Why are men’s and women’s scales different in the US and UK?
Historically the US system was built around the Brannock device, which has separate scales for men and women because adult women’s feet tend to be narrower at the heel for the same length. The numerical offset is roughly 1.5 sizes — a women’s US 8.5 is about the same internal length as a men’s US 7. EU and Japanese sizing is unisex (the same number on the box for either), which is why a single conversion column appears under EU and JP regardless of style.
What is Mondopoint and why is the Japanese size in centimetres?
Mondopoint (ISO/TS 19407) expresses shoe size as the foot length in millimetres, rounded to a 5 mm grid, with an optional width designator. Japan adopted Mondopoint as its national standard and writes the same figure in centimetres on the box (so 250 mm becomes "25.0"). This makes JP/Mondopoint the most physically meaningful of the four scales — the number is literally a foot length, not a manufacturer convention.
How big is the difference between brands?
Within the same region and style, brand-to-brand variance of half a size is very common, and a full size is not unheard of for narrow-fit European brands (Dior, Bottega) or some athletic brands (Converse runs about half a size large, Nike running shoes about half a size small). Use this calculator as your starting point, then check the brand’s own chart before buying. If you can, measure your foot length in millimetres at the end of the day and match that to the brand’s Mondopoint column — that’s the most reliable cross-brand comparison.
How do I measure my foot to use this calculator?
Stand on a sheet of paper with your heel touching a wall, weight evenly distributed. Mark the tip of your longest toe and measure from the wall edge of the paper to that mark in millimetres. Do this in the evening — feet swell during the day. Add about 5–10 mm for a comfortable shoe fit, then look up the resulting length in the JP/Mondopoint column of this calculator to find your size in every region.
Does this work for kids’ sizes?
No. This calculator covers the adult range only (roughly men’s US 5–14 and women’s US 4–12). Kids’ sizing uses different scales — UK and US kids run on their own numbered series that resets at the child/youth/adult boundary, and EU kids’ sizes line up with adult numbering but at smaller lengths. Use a dedicated kids’ chart, or measure your child’s foot in millimetres and match it to a brand’s Mondopoint table.
Why do I sometimes see two different EU sizes for the same US size?
The EU scale is defined in Paris points (one Paris point = 2⁄3 cm), but different manufacturers round differently and the relationship between EU and US is not a single clean integer — it drifts by half a point every couple of sizes. Our table uses the most widely-cited Brannock-aligned mapping (EU = US + 33 for men, US + 31 for women). You may see a half-point difference versus a particular brand’s chart; that is part of the normal vendor variance and is rarely enough to change your fit choice.