Why where you carry fat matters
Two people can share the same weight and the same BMI while carrying their fat in very different places — and the place matters. Fat stored around the abdomen, especially the deep visceral fat packed around the organs, is metabolically active in ways fat on the hips and thighs is not, and study after study links an abdomen-heavy pattern to higher risk of heart disease, type 2 diabetes and metabolic syndrome. The waist-to-hip ratio (WHR) captures that pattern with two tape measurements and one division: waist circumference divided by hip circumference. A low ratio describes a "pear" pattern, a high ratio an "apple" pattern, and the gauge on this page places your figure against the bands most commonly used for each sex.
The formula and the WHO-based bands
The bands shown on this page are the commonly used WHO-based bands. For women: low below 0.80, moderate 0.80–0.84, high at 0.85 or above. For men: low below 0.90, moderate 0.90–0.99, high at 1.00 or above — a ratio of 1.00 means the waist measures the same as the hips. Because it is a ratio, the units cancel: measure both in centimetres or both in inches and the answer is identical, as long as you are consistent.
Measuring so the number means something
Most WHR error is tape error, not arithmetic. Measure the waist at its natural narrowest point — for most people just above the navel, at the level of the lowest rib and the top of the hip bone — standing relaxed, at the end of a normal breath out, with the tape snug but not compressing the skin, and crucially not over bulky clothing. Measure the hips at their widest point, around the fullest part of the buttocks, with your feet together. Take each measurement twice; if the two tries differ by more than a centimetre, take a third and use the middle value. Measure at the same time of day when you re-check, since a large meal or bloating moves the waist reading temporarily. A centimetre of tape error at both points can move the ratio by about 0.02 — small, but enough to cross a band edge, which is one more reason to treat a borderline result as "around the boundary" rather than a verdict.
WHR alongside BMI, not instead of it
WHR and BMI answer different questions. BMI summarises how much mass you carry for your height; WHR summarises how that mass is distributed. Someone with a healthy BMI can still carry a high-risk, abdomen-heavy pattern — the pattern sometimes called normal-weight central obesity — and someone with a high BMI and strong hips and legs can sit in the low WHR band. Health guidance increasingly looks at both, plus waist circumference alone, because each catches people the others miss. Use this page as one honest signal among several, track it over months rather than days, and discuss a persistently high reading with a clinician, who can set it alongside blood pressure, blood sugar and lipids. This page gives general information only and is not medical advice.
Worked example
A woman with a waist of 80 cm and hips of 100 cm: ratio = 80 ÷ 100 = 0.80. On the commonly used WHO-based bands for women, 0.80 is the first value in the moderate band (0.80–0.84) — below 0.80 would be low, and 0.85 or above would be high. For a man the same 0.80 would sit comfortably in the low band, since men's bands run higher.
How to use this calculator
- Select female or male — the risk bands differ by sex.
- Measure your waist at its natural narrowest point and enter it in centimetres.
- Measure your hips at their widest point and enter them in the same units.
- Read your ratio and band in the headline panel and on the gauge.
- Re-measure monthly under the same conditions if you are tracking change, rather than chasing daily variation.
What moves the ratio — and what does not
Because WHR is a ratio, it changes when either measurement changes, and not always for the reason you hope. Losing abdominal fat lowers the waist and improves the ratio, which is the genuine win the measure is designed to detect. But building glute and hip muscle through training can also lower the ratio by raising the denominator — a real improvement in body composition that the scale might not reward at all. Conversely, losing muscle from the hips while keeping abdominal fat — as can happen with crash dieting or long inactivity — can leave weight lower and the ratio worse. That is why the ratio is best read alongside waist circumference on its own: if the waist itself is shrinking, the trend is good whatever the ratio's arithmetic does in a given month.
Expect slow movement. Fat distribution is strongly influenced by genetics, sex hormones and age, and it changes over months of sustained habits, not days. A realistic, worthwhile goal is edging the waist down through the ordinary levers — a modest calorie deficit, regular aerobic and resistance exercise, sleep, and moderation with alcohol, which preferentially encourages abdominal storage — while re-measuring under consistent conditions to confirm the direction.
Important note
For information only — not medical advice. This calculator uses standard published formulas to estimate values for general education and planning. It does not diagnose, treat, or replace the advice of a doctor or other qualified health professional. If you have a health concern, are pregnant, or are making decisions about treatment, medication, or a major diet or exercise change, please talk to a healthcare professional first.