Belt Size Calculator & Fitting Guide
Enter your waist measurement or pant size to see your belt size in centimeters and inches.
Gender
Input method
Waist circumference (cm)
Belt sizes are based on standard size charts. Sizing varies by brand and model, so check the brand's own size chart before you buy.
How to Measure Your Belt Size
There are two ways to find your belt size: measure a belt you already wear, or measure your waist with a tape measure. Both work; measuring an existing belt is faster if you have one that fits.
Measuring an Existing Belt from Fold to Middle Hole
Lay your existing belt flat on a surface. Measure from the fold at the back of the buckle to the hole you normally use (ideally the middle hole). This measurement in centimeters equals your EU belt size and closely matches your waist circumference.
EU Belt Size = Fold Behind Buckle → Middle Hole (cm)
How to Measure Your Waist with a Tape Measure
Wrap a soft tape around your waist where you normally wear a belt, just above the hip bones. Keep the tape flat and snug, and breathe normally without pulling in your stomach. The reading in centimeters is your EU belt size.
Measurement Point
Just above the hip bones, where the belt naturally sits
Tape Position
Flat and snug, without tightening, breathing normally
Using the Result
cm = EU size · ÷ 2.54 + 2 ≈ US size
The "Add 2 Inches" Rule for Pant Sizes
A simple way to pick a belt is to start from your pant size. In the US system, the standard rule is to buy a belt 2 inches larger than your pant size. The belt then buckles at the middle hole, with 2 holes on either side for adjustment.
Jeans vs. Trousers/Dress Pants Sizing Differences
Jeans and dress pants with the same stated size can differ by 2–4 cm in actual waist measurement. Jeans sizes (32, 34) are pattern sizes, not exact waist circumference. Dress trouser sizes (EU 44, 46…) map more directly to waist circumference. The calculator handles both systems separately.
Men's & Women's Belt Size Conversion Chart (Inches & cm)
| Waist (cm) | EU Belt | US Belt (in) | General Size | Recommended Length |
|---|---|---|---|---|
| 70–74 | 70–75 | 28–30 | S | 95–100 cm |
| 75–79 | 75–80 | 30–32 | S–M | 100–105 cm |
| 80–84 | 80–85 | 32–34 | M | 105–110 cm |
| 85–89 | 85–90 | 34–36 | M–L | 110–115 cm |
| 90–94 | 90–95 | 36–38 | L | 115–120 cm |
| 95–99 | 95–100 | 38–40 | XL | 120–125 cm |
| 100–109 | 100–110 | 40–44 | XXL | 125–135 cm |
What Is the "Middle Hole" Rule in Belt Fitting?
A belt typically has 5 holes spaced 2.5 cm (1 inch) apart. The "middle hole rule" says the belt should buckle at hole 3. This gives you 2 holes on each side: 2 holes × 2.5 cm = 5 cm of room in each direction, 10 cm in total, as your weight changes.
Ideal Belt Length and Tail Overlap
When buckled at the middle hole, the belt tail should extend 10–15 cm beyond the buckle. A tail under 5 cm means the belt is too small; over 20 cm means it's too large.
Total Belt Length ≈ Waist Circumference + 25 cm
Leaving Room for Weight Fluctuations
If your weight tends to change, you have two options: buy a belt that follows the middle-hole rule (5 cm of room in each direction), or choose a multi-hole belt with holes 1.5 cm apart for finer adjustment. Multi-hole belts also fit slimmer waists better and cope with day-to-day changes caused by different clothes.