UK Size to US Men's Converter
Convert UK Size (UK) to US Men's (US M) instantly. Formula: US M = UK × 0.5.
Shoe Size Converter
4 units available
1 UK = 0.5 US M
Formula:
US M = UK × 0.5With your value: 1 UK = 0.5 US M
Other UK Size to US Men's conversions
UK Size to US Men's Conversion Table
| UK Size (UK) | US Men's (US M) |
|---|---|
| 0.5 | 0 |
| 1 | 0.5 |
| 2 | 1.5 |
| 5 | 4.5 |
| 10 | 9.5 |
| 15 | 14.5 |
| 20 | 19.5 |
| 25 | 24.5 |
| 50 | 49.5 |
| 100 | 99.5 |
| 250 | 249.5 |
| 500 | 499.5 |
| 1000 | 999.5 |
US Men's to UK Size Conversion Table
| US Men's (US M) | UK Size (UK) |
|---|---|
| 0.5 | 1 |
| 1 | 1.5 |
| 2 | 2.5 |
| 5 | 5.5 |
| 10 | 10.5 |
| 15 | 15.5 |
| 20 | 20.5 |
| 25 | 25.5 |
| 50 | 50.5 |
| 100 | 100.5 |
| 250 | 250.5 |
| 500 | 500.5 |
| 1000 | 1,000.5 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
UK Size (UK)
Shoe Size
Only Mondopoint (ISO 9407) is defined from foot length in millimetres. US, UK and EU scales are trade conventions.
Manufacturer lasts differ. Treat cross-system results as a starting point, not a guaranteed fit.
Source: ISO 9407:2019, Footwear sizing — Mondopoint system
International Organization for Standardization · Reviewed 2026-07-01
US Men's (US M)
Shoe Size
Only Mondopoint (ISO 9407) is defined from foot length in millimetres. US, UK and EU scales are trade conventions.
Manufacturer lasts differ. Treat cross-system results as a starting point, not a guaranteed fit.
Source: ISO 9407:2019, Footwear sizing — Mondopoint system
International Organization for Standardization · Reviewed 2026-07-01
How to Convert UK Size to US Men's
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: US M = UK × 0.5
Reverse: UK = US M × 1.5
Step-by-Step Example
- Start with your value in UK Size. For example: 5 UK
- Apply US M = UK × 0.5
- The result is: 4.5 US M
About UK Size
UK shoe sizes are based on the length of the last, measured in barleycorns (1/3 inch).
Common uses: shoe shopping (UK), international sizing.
About US Men's
US men's shoe sizes are used in the United States and Canada.
Common uses: shoe shopping (US), footwear design.
Frequently Asked Questions
How many US Men's are in 1 UK Size?
There are exactly 0.5 US Men's in 1 UK Size.
What is the formula to convert UK Size to US Men's?
The formula to convert UK Size to US Men's is: US M = UK × 0.5. For example, to convert 10 UK Size to US Men's, you would apply the formula to 10.
What is a UK Size?
UK shoe sizes are based on the length of the last, measured in barleycorns (1/3 inch).
What is a US Men's?
US men's shoe sizes are used in the United States and Canada.
What are the common uses of UK Size?
The UK Size is commonly used in shoe shopping (UK), international sizing.
Related Shoe Size Conversions
Cite this page
UnitConvertLab. (2026). UK Size to US Men's converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/shoe_uk-to-shoe_us_men