Shoe Size ConversionFree online other calculator — instant results, no sign-up
Convert shoe sizes between US, UK and EU.
About the Shoe Size Conversion
This calculator converts shoe sizes between US, United Kingdom (UK), and European (EU) sizing standards, while also estimating corresponding foot length in centimeters. It is designed for shoppers, travelers, and retailers navigating international shoe sizing differences for men and women.
- US size
- The footwear size in standard US sizing (typically between 4 and 16, whole or half sizes).
- Sizing
- The target gender standard, selecting between 'Men' or 'Women'.
Formula and method
For Men: UK = US − 1; EU = 33 + US; Foot Length (cm) = (US + 22) × 0.847 For Women: UK = US − 2; EU = 31 + US; Foot Length (cm) = (US + 21) × 0.847
- USEntered United States shoe size
- UKConverted United Kingdom shoe size
- EUConverted continental European shoe size (Paris points)
- Foot LengthEstimated foot length in centimeters
The tool applies linear conversions based on standard adult sizing offsets for US men's and women's scales. The foot length approximation scales the shoe's internal length in Paris points (one point equals 2/3 cm, approximated via 0.847 cm per size increment formula) and rounds all final values to one decimal place.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- US size9
- SizingMen
Results
- UK8
- EU42
- Foot length26.3 cm
How to use the Shoe Size Conversion
- 1Enter your US shoe size (such as 9 or 8.5).
- 2Select whether the sizing standard is for Men or Women.
- 3Calculate the UK and EU equivalents by subtracting the offset or adding the baseline EU constant.
- 4Derive the estimated foot length in centimeters and review all three converted values.
Reading your result
The outputs display the equivalent UK and EU sizes alongside an approximate physical foot length. If purchasing shoes from brands based in Europe or the UK, use these corresponding numbers as a baseline. Half-size inputs will yield fractional EU or UK sizes, which may need to be rounded up to the nearest commercially available size.
Limitations
Shoe lasts vary widely between individual brands, shoe types (such as running shoes versus dress shoes), and widths (such as narrow, regular, or wide), which are not factored into this calculation. The tool also covers only adult sizing formulas and does not apply to children's or infant footwear scales.
Common questions
Why is the difference between US and UK sizes larger for women than men?+
In traditional shoe sizing scales, US men's sizes are typically 1 size larger than UK sizes, whereas US women's sizes are offset by approximately 2 sizes from UK adult sizing.
What should I do if my converted EU size is a fraction not sold in stores?+
Many European footwear manufacturers only produce whole EU sizes. In most cases, sizing up to the next full number provides a more comfortable fit, especially if wearing socks or insoles.
Does this calculation consider shoe width?+
No, this conversion assumes a standard medium width (D for men, B for women). If you have wider or narrower feet, you may need to adjust your size or select specific width designations.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
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Results are estimates for informational purposes and are not financial, medical or legal advice.