UK to US Women Conversion Table
| UK (UK) | US Women (US W) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 2.5 UK | 4.5 US W | American petite leather slingback kitten pumps | US W = 2.5 + 2 = 4.5 |
| 3 UK | 5 US W | Classic almond-toe block heel work pumps | US W = 3 + 2 = 5 |
| 3.5 UK | 5.5 US W | Handcrafted American leather penny loafers | US W = 3.5 + 2 = 5.5 |
| 4 UK | 6 US W | Cushioned everyday women's walking sneakers | US W = 4 + 2 = 6 |
| 4.5 UK | 6.5 US W | American leather ankle chelsea booties | US W = 4.5 + 2 = 6.5 |
| 5 UK | 7 US W | High-performance women's road running shoes | US W = 5 + 2 = 7 |
| 5.5 UK | 7.5 US W | Contemporary American platform leather mules | US W = 5.5 + 2 = 7.5 |
| 6 UK | 8 US W | Waterproof leather duck boots & outdoor pacs | US W = 6 + 2 = 8 |
| 6.5 UK | 8.5 US W | Western cowgirl ankle boots with Cuban heels | US W = 6.5 + 2 = 8.5 |
| 7 UK | 9 US W | Cushioned stability trail running sneakers | US W = 7 + 2 = 9 |
| 7.5 UK | 9.5 US W | Tailored knee-high equestrian dress boots | US W = 7.5 + 2 = 9.5 |
| 8 UK | 10 US W | American oil-resistant steel-toe work boots | US W = 8 + 2 = 10 |
| 8.5 UK | 10.5 US W | Waterproof outdoor mountain trekking boots | US W = 8.5 + 2 = 10.5 |
| 9 UK | 11 US W | Comfort-width orthopedic walking footwear | US W = 9 + 2 = 11 |
| 9.5 UK | 11.5 US W | Extended-size designer leather evening slip-ons | US W = 9.5 + 2 = 11.5 |
| 10 UK | 12 US W | Extended-range athletic court sneakers | US W = 10 + 2 = 12 |
UK to US Women Formula & Unit Definitions
Because both the UK and US Women sizing systems advance by exactly 1/3 inch (8.46 mm) per full numerical size, no fractional multiplier is required. The conversion is a direct linear translation: US W = UK + 2.
Quick Estimation: Simply add 2 to your UK shoe size to find your US Women's size. For example, a UK 5 equals a US Women 7, and a UK 6.5 equals a US Women 8.5.
UK (UK)
Source Standard- Calibrated along the 1324 King Edward II barleycorn scale (8.46 mm per full size).
- Single continuous sizing baseline traditionally shared across unisex and women's lasts.
- Default medium width in the United Kingdom is standardized as 'D' for women's footwear.
US Women (US W)
Target Standard- Standardized on the American Brannock Device women's scale, offset by two full sizes from UK lasts.
- Graded in 1/3-inch (8.46 mm) intervals for full sizes and 1/6-inch (4.23 mm) for half sizes.
- Default medium width in North America is classified as 'B' width across women's brands.
Frequently Asked Questions
Q.How do you convert UK shoe size to US Women's?
Add 2 to your UK shoe size. For example, a UK 5 is a US Women 7. To convert in the opposite direction, consult our US Women to UK shoe converter.
Q.What is the formula for converting UK to US Women's shoe sizes?
The official formula is US W = UK + 2. Both systems use the historic 1/3-inch barleycorn increment, making the conversion an exact two-size addition.
Q.What is a UK size 6 in US Women's shoes?
A UK size 6 corresponds to a US Women's size 8 (6 + 2 = 8). This is one of the most common international sizing conversions for women's footwear.
Q.How does shoe width compare between UK and US Women sizes?
A standard US Women medium width is 'B', whereas a standard UK women's medium width is 'D'. UK shoes generally offer a slightly more relaxed fit through the forefoot.