OhMyCalc

Hat Size Calculator

Convert head circumference to hat sizes (US, UK, EU).

How to Use the Hat Size Calculator

  1. Enter the required values.
  2. Click Calculate to see the results.
  3. Review the output values.
  4. Adjust inputs as needed.

Referencia Rápida

DeA
54 cmS / 6¾
56 cmM / 7
58 cmL / 7¼
60 cmXL / 7½
62 cmXXL / 7¾
64 cmXXXL / 8

Casos de Uso

Fórmula

Fitted size = Circumference (in) / π. Generic: S (<54), M (54–56), L (56–58), XL (58–60).

Preguntas Frecuentes

How to use?
Enter the data and click the calculate button.
Calculation accuracy?
Calculations are performed with high precision.
Is it free?
Yes, all calculators are completely free.