Bodilab AIWaist-to-Height Ratio Calculator
Waist-to-height ratio (WHtR) is your waist ÷ your height. The simple rule: keep your waist under half your height — a ratio below 0.5. It captures abdominal fat better than BMI and needs only a tape measure. Enter your numbers below.
Waist-to-height ratio chart
| Ratio | General interpretation |
|---|---|
| < 0.40 | Low — may be underweight |
| 0.40 – 0.49 | Healthy |
| 0.50 – 0.59 | Increased risk (central fat) |
| ≥ 0.60 | High risk |
General public-health guidance (the "waist < half your height" boundary at 0.5 is widely used, e.g. UK NICE guidance). This is not a diagnosis; risk depends on many factors.
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Bodilab AI estimates body-fat, waist-to-hip and muscle from a single photo, so you can watch your midsection change week to week. Estimates, not medical advice.
Download on theApp StoreFAQ
What is a healthy waist-to-height ratio?
Under 0.5 (waist less than half your height). Below 0.4 can be low, 0.4–0.5 healthy, 0.5–0.6 increased risk, above 0.6 high risk. General guidance, not a diagnosis.
Why is it better than BMI?
It captures abdominal (visceral) fat, works across heights with one cutoff (0.5), and needs only a tape. BMI can't separate muscle from fat.
How do I measure my waist?
Around the narrowest point between lowest rib and hip bone (about the navel), relaxed, at the end of a breath out, tape snug. Same spot each time.