Belt Size
Find your belt size from waist measurement or current trousers.
About Belt Size
The trouser waist number is increased by two to three inches so the belt reaches past the loops. Belt sizing is not the same as waist size, and buying the tag number leaves the belt too short.
Formula
Belt Size
Belt size = waist size + 2-3 inches
- waist size
- Your trousers' waist tag number
Worked example
With the default values below, Belt Size returns Belt Size of 36. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Waist or trouser sizeminimum 20 in
- 34 in
- Styleone of Standard +2in, Dress +3in
- Standard +2in
Results
- Belt Size
- 36 in
- Belt Size
- 91 cm
- Note
- Trouser sizes usually skip 2 inches, so buy the next band up
Step by step
- 1Values used
- 2Belt Size
- 3Belt Size= 36 in
- 4Belt Size= 91 cm
- 5Note= Trouser sizes usually skip 2 inches, so buy the next band up
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Belt Size calculated?
Belt size = waist size + 2-3 inches The trouser waist number is increased by two to three inches so the belt reaches past the loops.
Why does Belt Size matter?
Belt sizing is not the same as waist size, and buying the tag number leaves the belt too short.
What values do I need to enter?
This calculator takes 2 inputs: Waist or trouser size, Style. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.