US to UK Shoe Size Calculator — American to British
Convert US shoe sizes to UK (British) sizes or UK back to US — for men and women. Includes the EU equivalent and an estimate of your foot length in centimetres and inches.
Gender
Convert from
Standard conversion — fit can vary ±0.5 size by brand
- 1
UK offset for this gender
0.5UK men's sizes are 0.5 smaller than US; women's are 1.5 smaller. - 2
UK shoe size
10 − 0.5 = 9.5
How does this calculator work?
UK = US − 0.5 (men) or US − 1.5 (women). US = UK + 0.5 (men) or UK + 1.5 (women). EU = UK + 33.5 (men) or UK + 32.5 (women). Foot length ≈ EU × 2/3 cm − 1.5 cm. Fit can vary ±0.5 size by brand — check the specific brand's chart when ordering online.
Formula
How this is calculated
US and UK shoe sizes use very similar scales but with a small offset. For men's shoes, UK sizes are half a size smaller than the equivalent US size (UK = US − 0.5). For women's shoes, the offset is one and a half sizes (UK = US − 1.5). The difference arises from the separate historical origin of each scale: US sizing developed independently from the UK system, and the two were never fully standardised relative to each other.
EU sizes can be derived from the UK size by adding the reverse EU offset: EU = UK + 33.5 for men, EU = UK + 32.5 for women (equivalent to EU = US + 33 or US + 31 via the US anchor). Foot length in centimetres is approximated from the EU insole size: EU × (2/3) cm gives the insole length, and subtracting ~1.5 cm of typical toe room estimates the actual foot length.
These conversions are widely-used averages. In practice, shoe sizing is not fully standardised globally — a UK 9 from one British brand can differ from a UK 9 from a US brand sold in UK sizes. Always check the specific brand's size guide, and consider using your measured foot length in centimetres as the most reliable reference.
Frequently asked questions
No. US men's 10 equals UK 9.5, and US women's 10 equals UK 8.5. The US system runs 0.5 sizes larger for men and 1.5 sizes larger for women compared to UK sizing.
The gender offset is a quirk of the US sizing system, not the UK one. UK adult sizing is technically unisex (a UK 7 is the same foot length regardless of gender), but the US assigns separate scales for men and women that start at different absolute values. When you map both US scales to the UK scale, you get offsets of 0.5 (men) and 1.5 (women).
UK 7 men's equals US 7.5, and UK 7 women's equals US 8.5. If you're unsure of the gender sizing, check the insole length against the approximate foot length: UK 7 ≈ EU 40.5 ≈ 26 cm foot length.
Also known as
TG we-Calculate Editorial Team. (2026). US to UK Shoe Size Calculator — American to British [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/us-uk-shoe-size-calculator
TG we-Calculate Editorial Team. "US to UK Shoe Size Calculator — American to British." TG we-Calculate. 2026. https://we-calculate.com/calculator/us-uk-shoe-size-calculator.
TG we-Calculate Editorial Team, "US to UK Shoe Size Calculator — American to British," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/us-uk-shoe-size-calculator
@misc{wecalculate_us_uk_shoe_size_calculator, title = {US to UK Shoe Size Calculator — American to British}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/us-uk-shoe-size-calculator}}, year = {2026}, note = {TG we-Calculate} }
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