UK Size to US Women's Converter
Convert UK Size (UK) to US Women's (US W) instantly. Formula: US W = UK × 3.
Shoe Size Converter
4 units available
1 UK = 3 US W
Formula:
US W = UK × 3With your value: 1 UK = 3 US W
Other UK Size to US Women's conversions
UK Size to US Women's Conversion Table
| UK Size (UK) | US Women's (US W) |
|---|---|
| 0.5 | 2.5 |
| 1 | 3 |
| 2 | 4 |
| 5 | 7 |
| 10 | 12 |
| 15 | 17 |
| 20 | 22 |
| 25 | 27 |
| 50 | 52 |
| 100 | 102 |
| 250 | 252 |
| 500 | 502 |
| 1000 | 1,002 |
US Women's to UK Size Conversion Table
| US Women's (US W) | UK Size (UK) |
|---|---|
| 0.5 | -1.5 |
| 1 | -1 |
| 2 | 0 |
| 5 | 3 |
| 10 | 8 |
| 15 | 13 |
| 20 | 18 |
| 25 | 23 |
| 50 | 48 |
| 100 | 98 |
| 250 | 248 |
| 500 | 498 |
| 1000 | 998 |
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 Women's (US W)
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 Women's
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: US W = UK × 3
Reverse: UK = US W × -1
Step-by-Step Example
- Start with your value in UK Size. For example: 5 UK
- Apply US W = UK × 3
- The result is: 7 US W
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 Women's
The us women's (US W) is a unit of footwear sizing. The us women's scale is offset from the centimetre of foot length scale, so converting it requires both a factor and an offset rather than a single multiplier. UnitConvertLab converts it against every other shoe size unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: shoe size calculations, engineering and science, education.
Frequently Asked Questions
How many US Women's are in 1 UK Size?
There are exactly 3 US Women's in 1 UK Size.
What is the formula to convert UK Size to US Women's?
The formula to convert UK Size to US Women's is: US W = UK × 3. For example, to convert 10 UK Size to US Women'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 Women's?
The us women's (US W) is a unit of footwear sizing. The us women's scale is offset from the centimetre of foot length scale, so converting it requires both a factor and an offset rather than a single multiplier. UnitConvertLab converts it against every other shoe size unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
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 Women's converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/shoe_uk-to-shoe_us_women