Waist to hip ratio calculator
Where you store fat, rather than how much of it there is.
The WHO thresholds
| Sex | Substantially raised risk at |
|---|---|
| Men | 0.90 and above |
| Women | 0.85 and above |
These come from the WHO's 2008 expert consultation, which reviewed the evidence linking waist measurements to disease risk across populations. They are screening thresholds, and crossing one is a reason to talk to someone, not a diagnosis of anything.
For the simpler check that most current guidance points at, use thewaist to height ratio.
Common questions
What is a healthy waist to hip ratio?
The WHO's 2008 expert consultation treats 0.90 or above in men and 0.85 or above in women as substantially raised risk. Below those is the healthier side. The thresholds differ because fat distribution differs between sexes.
Waist to hip or waist to height?
Waist to height is the simpler and more widely recommended screening tool now, and it is the one NICE put in its 2025 guidance. Waist to hip remains useful because it describes shape: whether you carry weight around the middle or lower down. They answer slightly different questions and this site offers both.
Where do I measure the hips?
Around the widest part of the buttocks, with the tape level all the way round and not compressing. The waist goes halfway between your lowest rib and the top of your hip bone, after breathing out.
Does a low ratio mean I am healthy?
No single measurement means that. A low ratio means your fat is not concentrated around your middle, which is one favourable sign among many. It says nothing about blood pressure, blood sugar, fitness or anything else.
Sources
Every figure above comes from one of these. Check them.
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This is not medical advice. Body Numbers is a calculator. It does not diagnose, treat or monitor any condition, and no number it produces should replace a conversation with a doctor or a dietitian. If a result worries you, or if you are pregnant, unwell, or under eighteen, speak to a health professional.
