Kids Growth & Shoe Size Calculator

Quick answer:

Free kids shoe size calculator: enter your child

Enter your child's foot length in centimeters to get their current kids shoe size (US, UK, EU) and approximate age range. Use the larger foot and leave a little room for growth when buying shoes.

Child's foot length (cm) cm

Kids shoe size:

Enter foot length above.

Growth tip: Kids' feet grow quickly. Check length every few months. Allow about 1–1.5 cm room at the toe; when there's less than half a thumb width, size up.

How to measure kids' feet

Have your child stand on a piece of paper against a wall. Mark the tip of the longest toe and measure from the wall to the mark in cm. Use the larger foot. See our Kids Printable Shoe Size Guide for a full chart.

Related tools

Foot Measurement Calculator (adults & kids)
Shoe Size Converter
Printable Size Charts — kids guide, EU/US chart, cm ruler
Measurement Tools

Common questions

How should I use this converter?

Pick your region and size, then read the equivalents. When in doubt, measure in centimeters and compare to the brand chart.

Why do sizes differ between countries?

Each region uses its own scale; mapping through foot length (cm) reduces error.

More on Kids Growth & Shoe Size Calculator

See linked guides on this site for measurement tips and regional differences.

Data sources

ISO and regional footwear sizing references (length-based mapping)
Published brand size charts (e.g. Nike, Adidas) for cross-checks—not endorsements
International measurement and apparel sizing studies (public summaries)

Why Sizes May Vary

Shoe and clothing sizes can vary between brands due to manufacturing differences, materials, and regional sizing standards.

Frequently Asked Questions

What is EU 42 in US shoe size?

EU 42 typically converts to US men's size 9 and US women's size 10.5, depending on brand and width. Use any converter on this page when available.

Are EU and US shoe sizes the same?

No. The EU sizing system and US shoe sizing scale use different scales. International shoe size conversion is most reliable when you anchor to foot length in cm.