US to UK Shoe Size
Convert US shoe sizes to UK sizes for men and women. Free US to UK shoe size converter with gender-specific formulas, foot length in cm, and comparison charts.
About This Calculator
The US to UK Shoe Size Converter helps you quickly find your correct UK shoe size from your US size. Whether you are shopping online from British retailers, traveling to the UK, or comparing international footwear standards, this calculator gives you an accurate UK size for both men and women's shoes.
The conversion is based on the standard formulas used by the US and UK shoe sizing systems. US men's sizes are one full size larger than UK sizes (US men 10 = UK 9), while US women's sizes are two sizes larger than UK sizes (US women 8 = UK 6). The calculator also displays your estimated foot length in centimeters by reversing the sizing formula, giving you a second reference point for finding the perfect fit.
Regional Notes
United States: The US sizing system uses separate scales for men (size = 3 × foot length in inches − 22) and women (size = 3 × foot length in inches − 21). US sizes typically range from 5 to 15 for men and 4 to 14 for women. Children's US sizing follows a different formula (size = 3 × foot length in inches − 9.67).
United Kingdom: The UK uses a single scale for both men and women (size = 3 × foot length in inches − 23). UK adult sizes typically range from 2 to 14. Unlike the US system, men and women with the same foot length wear the same UK shoe size. This means the difference between US and UK sizes is 1 size for men and 2 sizes for women consistently.
International: Many international brands provide size conversion charts, but these can vary slightly between manufacturers. Always check the brand's specific sizing guide when possible. For half sizes and wide fittings, the conversion formulas still apply — simply round to the nearest half size.
Frequently Asked Questions
How do you convert US men shoe size to UK?
For men, US shoe sizes are one size larger than UK sizes. To convert US men's size to UK, subtract 1. For example, US men's size 10 equals UK size 9. This conversion applies to adult male footwear and is consistent across most major shoe brands.
How do you convert US women shoe size to UK?
For women, US shoe sizes are two sizes larger than UK sizes. To convert US women's size to UK, subtract 2. For example, US women's size 8 equals UK size 6. This two-size difference is standard across the footwear industry.
How do US and UK shoe sizing systems differ?
The US system uses different formulas for men and women, while the UK uses the same scale for both. The US men's formula is: size = (3 x foot length in inches) - 22. The US women's formula is: size = (3 x foot length in inches) - 21. The UK formula is: size = (3 x foot length in inches) - 23. This means UK sizes are always smaller than US sizes for the same foot length.
Is a UK size 7 the same as a US size 7?
No, UK size 7 is not the same as US size 7. For men, UK size 7 equals US size 8 (US is one size larger). For women, UK size 7 equals US size 9 (US is two sizes larger). Always use a conversion chart or calculator when buying shoes from a different country to ensure the correct fit.
What is the formula to calculate UK shoe size from foot length?
The UK shoe size formula is: UK size = (3 x foot length in inches) - 23. For example, if your foot measures 10.67 inches, your UK size is (3 x 10.67) - 23 = 9. To convert from US to UK, simply subtract 1 for men or 2 for women from your US size.
How can I measure my foot length accurately at home?
Place your foot flat on a piece of paper against a wall, mark the longest toe and heel, and measure the distance in inches or centimeters. Measure both feet and use the larger measurement, as feet are often slightly different sizes. For the most accurate fit, measure your feet in the afternoon when they are slightly swollen from daily activity.
Where is this calculator available and who is it for?
This free online US to UK shoe size converter is available worldwide on Calculy. It is designed for anyone shopping for shoes from international brands, traveling to the UK or US, or comparing footwear sizes across these two sizing systems. The calculator supports both men's and women's sizes and provides instant conversions with visual charts.