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Inches to centimetres, properly rounded
The raw conversion from inches to centimetres is a simple multiplication, but real belts aren't sold in arbitrary decimal sizes — they're stocked in practical steps.
cm = inches × 2.54, rounded to the nearest 5cm step
That rounding is why a 36″ belt converts to 90cm rather than the raw 91.44cm the math alone would produce.
Questions
Conversion FAQs
Most centimetre-sizing markets stock belts in 5cm increments rather than every single centimetre, similar to how US sizes are typically sold in even inches.
The underlying math is exact, but the final size is rounded to the nearest commonly stocked step, so it's a close practical match rather than a decimal-perfect figure.
Yes, the UK generally follows the same inch-based sizing as the US for belts.
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