Convert a child's foot length into US, UK and EU shoe sizes.
Three linear approximations map foot length to US, UK and EU children's sizes, all derived from the same measured length. Kids outgrow shoes quickly, and conversions differ by region, so a consistent formula prevents buying too-small footwear.
Child Shoe Size
UK ~ foot(cm) x 0.4 + 3; US = UK + 1; EU = foot(cm) x 1.5 + 1
UK ~ foot(cm) x 0.4 + 3; US = UK + 1; EU = foot(cm) x 1.5 + 1 Three linear approximations map foot length to US, UK and EU children's sizes, all derived from the same measured length.
Kids outgrow shoes quickly, and conversions differ by region, so a consistent formula prevents buying too-small footwear.
This calculator takes 1 input: Foot length. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.