This is what the calculation gives for the numbers you entered. It is an estimate, not advice, and it knows nothing about your situation beyond those numbers. Rules for United States change on a published schedule; the effective date is shown on every rule-based tool.
How this is calculated
The ratio captures where fat is stored. Visceral fat around the abdomen is metabolically active and associated with cardiovascular and metabolic risk in a way that subcutaneous fat on hips and thighs is not, which is why two people at the same BMI can carry very different risk. Thresholds are 0.90 for men and 0.85 for women in the WHO classification, though they vary between populations.
Worked examples
Each of these is asserted on every build. If a change to the engine ever moved one of these answers, the build would fail before the page could print it.
a 92 cm waist and 100 cm hips
- Waist
- 92 cm
- Hips
- 100 cm
- Sex
- Male
- Height, for the waist to height ratio
- 172 cm
- Population, for the threshold
- WHO general
- Target ratio, if you have one
- 0
Waist to hip ratio0.92
The ratio is waist over hip, 92/100; the target waist is 100 x 0.9
Open this exampleexactly at the threshold
- Waist
- 90 cm
- Hips
- 100 cm
- Sex
- Male
Waist to hip ratio0.9
boundary
Open this exampleMethod and limits
What it assumes
- Waist measured at the narrowest point and hips at the widest.
What it deliberately does not model
- Measurement site varies between protocols, which changes the ratio.
- Thresholds differ by population, and South Asian populations carry risk at lower values.
- Waist to height ratio predicts outcomes at least as well and needs one fewer measurement.
Formula version 1.0.0 · definition 1.0.0 · United States · Report a problem with this calculator
Frequently asked questions
- Why does fat distribution matter?
- Visceral fat around the organs is metabolically active in a way that hip and thigh fat is not, so two people at the same weight can carry very different risk.