Waist-to-Height Ratio Calculator
Gauge health risk from your waist and height.
Keep your waist under half your height
The waist-to-height ratio is one of the simplest and most reliable health screens: divide your waist by your height. It flags central fat, which carries more risk than fat elsewhere, and works across body types.
A waist of 80 cm with a height of 175 cm gives a ratio of about 0.46 — within the healthy range. The rule of thumb is to keep your waist under half your height, a ratio below 0.5.
Simple and private
The calculation runs in your browser, so these measurements never leave your device.
Frequently Asked Questions
What is the waist-to-height ratio?
Your waist circumference divided by your height, in the same units. It is a simple, strong indicator of central-fat health risk.
What is a healthy value?
Keeping your waist under half your height — a ratio below 0.5 — is the widely cited healthy target.
Why is it useful?
It works across ages and body types better than weight alone, and needs only a tape measure.
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