Shoe Size Converter
Shoe sizing varies significantly around the world — the same foot length can correspond to a US 9, a EU 42, a UK 8, or 26 cm depending on the regional standard. This converter uses internationally recognised lookup tables to translate between US (men's and women's), European (EU), UK, and centimetre (foot length) measurements instantly.
Because women's US sizes are typically 1.5 sizes larger than men's US sizes for the same foot, gender selection matters for accurate results. The converter highlights your matched size in the full reference table so you can also check adjacent half-sizes before buying.
How it works
Shoe size conversion relies on standardised lookup tables rather than a single formula. The EU size is derived from foot length in Paris points (1 Paris point ≈ 0.667 cm): EU = foot_length_cm / 0.667. US men's sizes follow the relation US = (foot_length_inches − 7.333) / 0.333 + 1, and UK sizes are approximately US − 0.5 for men. Women's US sizes run ~1.5 sizes larger than men's for the same foot.
Use cases
- Shopping on international online stores that list sizes in a foreign system
- Converting children's or adult shoe sizes when buying gifts abroad
- Finding your EU size from a US or UK size before a trip to Europe
- Verifying foot length (cm) against a brand's specific size chart
- Comparing sizing between American and British athletic shoe brands
Frequently asked questions
What is a US size 9 in EU sizing?
A US men's size 9 is approximately a EU 42, while a US women's size 9 is roughly a EU 40. The exact match varies by brand because sizing standards differ slightly, so checking foot length in centimetres against the reference table gives the most reliable result.
How do I measure my foot length for shoe size?
Stand on a sheet of paper with your heel against a wall, then mark the tip of your longest toe and measure the distance in centimetres. Measure both feet in the afternoon, when feet are slightly larger, and use the bigger value. That length maps directly to a size in the converter's table.
What is the difference between US men's and women's shoe sizes?
For the same foot length, a US women's size runs about 1.5 sizes larger than the US men's size. So a men's 8 is roughly a women's 9.5. This is why selecting gender matters in the converter, while EU and centimetre measurements are unisex.
Are UK and US shoe sizes the same?
No. UK and US sizes use different starting points, and for men a US size is about 0.5 to 1 size larger than the equivalent UK size. For example, a UK 8 is roughly a US 8.5–9 for men. Always convert rather than assuming the numbers are interchangeable.
Why do shoe sizes differ between brands?
Even within the same regional standard, brands use different lasts (the molds shoes are built on), so the internal shape and fit vary. Athletic, dress, and casual shoes from the same size number can feel different. Comparing the brand's foot-length chart in centimetres is more accurate than relying on the size number alone.