Hat Size Calculator
This hat size calculator is a useful tool and helps ensure a comfortable and proper fit when purchasing or making hats.
For example, if you measure your head circumference to be 58 cm, you can use hat size calculator to convert this measurement into the corresponding hat size, which might be 7 1/4 in US sizing or 57-58 in European sizing.Hat Size Calculation Chart
| Head Circumference (cm) | US Hat Size | UK Hat Size | European Size |
|---|---|---|---|
| 54-55 | 6 3/4 | 6 5/8 | 55 |
| 56-57 | 7 | 6 7/8 | 56 |
| 58-59 | 7 1/4 | 7 1/8 | 58 |
| 60-61 | 7 1/2 | 7 3/8 | 60 |
| 62-63 | 7 3/4 | 7 5/8 | 62 |
| 64-65 | 8 | 7 7/8 | 64 |
Hat Size Measurement Formula
The Hat Size Measurement Formula is simple:
Hat Size = Head Circumference / π (pi)If your head circumference is 58 cm:
Hat Size = 58 cm / 3.14159 ≈ 18.46 cm (or about 7 1/4 in US sizing)How to Determine Hat Size from Measurement?
To determine your hat size from a measurement:
Measure your head circumference using a flexible tape measure.
Use the measurement to find your size on a hat size chart.
With head circumference 59 cm:
Look up 59 cm on the chart.
You’ll find that it corresponds to a US hat size of 7 1/4, a UK size of 7 1/8, and a European size of 58.
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