UK to US Shoe Size Converter

Convert British (UK) shoe sizes into American (US) sizes instantly. UK and US sizing look almost identical, but they are not — the offset between them trips up shoppers all the time. This tool gives you the correct US number for both men and women, with a full reference chart so you order the right size with confidence.

Same roots, different offset: UK and US sizes share the historic Barleycorn measurement (one size = 1/3 inch), but US men's sizes run about 0.5 size larger than UK, and the women's offset is bigger still. Never assume the numbers are interchangeable.

When You Need This

Shopping US Stores

Buying from American brands or sneaker drops? Convert your UK size so you don't order a half size off.

Reading US Listings

Marketplace listings and reviews often quote US sizes — translate them to the UK number you know.

Sneaker Resale

The resale world runs on US sizing — match your UK size accurately before buying or listing.

How to Convert UK to US

1

Select Your Gender

Toggle between Men and Women. UK men's and women's scales are different, and so are their US offsets — this choice is essential for an accurate result.

2

Pick Your UK Size

Choose your UK shoe size from the dropdown. Half sizes (such as UK 8.5) are supported for a closer fit.

3

Read the US Result

The equivalent US size appears instantly. Use the swap button to reverse the direction and convert US back to UK at any time.

4

Cross-Check the Chart

Scroll to the full size chart to see your size lined up across US, UK, EU, and CM (JP) — handy for confirming the fit in any system.

Brands vary. These conversions follow standard sizing, but real-world fit differs between makers. When unsure, measure your foot length in centimeters and check it against the brand's own chart.

Features

Built for Accuracy

Separate Men & Women Charts

UK sizing differs by gender, so men and women each get their own table and the correct US offset.

Instant Two-Way Swap

Flip between UK-to-US and US-to-UK with one tap — convert in whichever direction you need.

Full Four-System Chart

Each row aligns US, UK, EU, and CM (JP), so you can convert to EU or CM from the same screen.

Foot Length in CM

The CM column shows foot length in centimeters (Mondopoint) — the most reliable fit reference.

Common UK to US Conversions

UK Men	US	UK Women	US
UK 6.5	US 7	UK 4	US 6.5
UK 7.5	US 8	UK 5	US 7.5
UK 8	US 8.5	UK 6	US 8.5
UK 9	US 9.5	UK 6.5	US 9
UK 9.5	US 10	UK 7.5	US 10.5

Tip: For men, the rule of thumb is "US is about half a size up from UK." For women the gap is larger — a UK 4 is roughly a US 6.5 — so always confirm with the gender toggle rather than guessing.

Frequently Asked Questions

What is a UK 9 in US size?

A UK men's 9 is approximately US men's 9.5. On the women's scale a UK 9.5 is approximately US women's 12. Select your gender for the correct match.

Are UK and US shoe sizes the same?

No — they are close but not identical. UK men's sizes typically run about 0.5 size smaller than US men's sizes, and the women's offset is larger. Treating them as the same is a common sizing mistake.

Is UK sizing the same for men and women?

No. UK men's and women's sizes use different scales, just like the US system. A UK 6 in men's is a much larger shoe than a UK 6 in women's, so the gender toggle changes the result.

Why do UK and US sizes have an offset if they share a system?

Both descend from the Barleycorn system (one size = 1/3 inch), but they start counting from a different "zero" point. The US scale begins lower, so a US number lands about half a size above the equivalent UK number for men.

Can I also convert UK to EU or CM?

Yes. The size chart shows each size across US, UK, EU, and CM (JP) in a single row, and you can change the "To" system in the converter to read EU or CM directly.

What if I'm between two US sizes?

When your UK size falls between two US numbers, rounding up is usually the safer choice for comfort. For the most reliable answer, compare your measured foot length in centimeters with the CM column.

UK to US Shoe Size Converter