Shoe Size Conversion

Convert US, UK and EU shoe sizes.

UK size 8

EU size 42.43

Formula: UK ≈ US − 1 ; EU ≈ US × 1.27 + 31

Step-by-step with your numbers:

1. Values used:

2. US men's size = 9

4. UK size = 8

5. EU size = 42.43

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Approximate shoe-size conversion between US, UK and EU.

The math behind it

UK ≈ US − 1; EU ≈ (US + 1.5) × 1.5. Exact fits vary by brand.

US 9 → UK 8, EU ~42.

Women's sizes?

Subtract ~1.5 from the US men's size for US women's.