Helmet size calculator
Estimate helmet or headwear size from head circumference.
How to use the result
- Measure using the guide and avoid rounding too early.
- Compare the best and neighbouring option, focusing on the limiting measurement.
- Before buying, check the exact product chart, cut and fabric.
Important: The result is a guide. Always check the exact product chart, cut, fabric stretch and return policy.
Advertisement
Next step
Private size passport
Save your and your family measurements locally. Export a private card and reuse it in calculators.
Clothing size calculator
Match chest, waist and hips to a general size chart and see the limiting measurement.
Match a store size chart
Enter a product-specific chart and find the best and neighbouring size without uploading measurements.
Shoe size calculator
Convert foot length into an approximate EU, UK, US and Mondopoint size.