Enter your Head Circumference and choose your Measurement Unit and Helmet Category, and this Helmet Size Calculator returns your Recommended Helmet Size along with the matching Size Range in both CM and inches, plus Fit Notes to help you get a snug, safe fit before you ride.
Recommended Helmet Size
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Size Range (CM)
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Size Range (Inches)
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Fit Notes
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Use a soft measuring tape to measure around your head just above your eyebrows and ears. The tape should be snug but not tight. If you don't have a measuring tape, use a string and then measure it with a ruler.
A properly fitted helmet is essential for safety, comfort, and protection. An ill-fitting helmet can shift during a crash, reducing its effectiveness, or cause discomfort during long rides.
Yes, helmet sizes can vary significantly between manufacturers. Always check the specific brand's sizing chart as a Medium in one brand might fit differently than a Medium in another brand.
If you're between sizes, consider your head shape and personal preference. A slightly snugger fit often breaks in over time, while a loose helmet will never fit properly and may be unsafe.
Yes, visiting a dealer for expert fitting is highly recommended. They can help you find the perfect helmet for your head shape, riding style, and ensure proper fit with different brands.
A properly fitted helmet should feel snug but comfortable, with no pressure points. It shouldn't move when you shake your head, and there should be no gaps between your head and the helmet padding.
Youth helmets have different size ranges, typically starting smaller than adult helmets. Youth sizes generally range from 49-54cm, while adult sizes start from 51cm and go up to 70cm or larger.