Waist-to-Height Ratio Calculator
Free waist-to-height ratio (WHtR) calculator — check central-fat health risk with the simple "waist under half your height" rule.
Everyday Uses
Simple check
Keep your waist under half your height — one quick ratio.
Risk insight
Gauge central-fat health risk beyond what BMI shows.
Track progress
Watch the ratio improve as your waist changes.
Any units
Works the same in centimetres or inches.
Frequently Asked Questions
What is waist-to-height ratio?
Waist-to-height ratio (WHtR) is your waist circumference divided by your height, in the same units. It measures central (abdominal) fat, which carries more health risk than fat stored elsewhere. It works across ages and ethnicities and is often a better risk indicator than BMI.
What is a healthy waist-to-height ratio?
The simple guideline is to keep your waist less than half your height — a ratio under 0.5. Roughly: below 0.4 may be too low, 0.4 to 0.49 is healthy, 0.5 to 0.59 signals increased risk, and 0.6 or above is high risk. A 175 cm person should aim for a waist under about 87 cm.
Is waist-to-height ratio better than BMI?
It is a useful complement. BMI does not distinguish fat from muscle or show where fat sits, whereas WHtR targets harmful belly fat directly. Using both gives a fuller picture. This is general information, not medical advice.