Belt Size Converter
Convert belt sizes between US, EU, and UK systems and waist measurements in inches and centimeters.
Includes a size chart for men and women with buying tips.
Type in any field — the others update instantly.
Belt sizes vary by region. Most are based on waist measurement, but conventions differ.
US/UK belt sizes are in inches. They typically add 2 inches to your trouser waist size. So a size 34 trouser = size 36 belt.
EU belt sizes are in centimeters, measured at the middle hole.
Conversion:
- 1 inch = 2.54 cm (exact)
Common belt size chart:
| US/UK Belt | EU Belt | Waist (in) | Waist (cm) |
|---|---|---|---|
| 30 | 76 | 28 | 71 |
| 32 | 81 | 30 | 76 |
| 34 | 86 | 32 | 81 |
| 36 | 91 | 34 | 86 |
| 38 | 97 | 36 | 91 |
| 40 | 102 | 38 | 97 |
| 42 | 107 | 40 | 102 |
| 44 | 112 | 42 | 107 |
Tip: Measure your existing belt from the buckle pin to the hole you use most.
The “add 2 inches” rule throws people, but it makes sense once you know belts are sized to the middle hole, not the end. Your belt size is roughly your trouser waist plus a couple of inches, leaving holes on either side for the inevitable changes after a big meal or over a year. A size 36 belt fits a 34 waist comfortably at the center hole.
The most reliable method skips the chart entirely: take a belt that already fits, measure from the buckle pin to the hole you actually use, and buy that length. Sizing varies enough between brands and styles (designer belts in particular sometimes label by the EU centimeter length) that the number on the package is only a starting point. When ordering online, that pin-to-hole measurement in centimeters is what removes the guesswork, since a “size 36” from two makers can differ by an inch or more.
How we build and check this converter
This converter runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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