Waist to Hip Ratio Calculator
The ratio between your waist and your hips describes where your body stores fat — and that pattern carries independent health information.
Apple and pear, and why it matters
Two people with identical BMI and identical body fat percentage can have very different health risks depending on where that fat sits. The waist-to-hip ratio is the classic way of describing the difference.
Android or “apple” distribution concentrates fat around the abdomen, much of it visceral — wrapped around the liver, pancreas and intestines. This pattern is more common in men and in post-menopausal women, and it is the one associated with insulin resistance and cardiovascular disease.
Gynoid or “pear” distribution stores fat subcutaneously around the hips and thighs. It is more common in pre-menopausal women and appears to be metabolically benign, and possibly mildly protective: gluteofemoral fat acts as a stable long-term sink that keeps fatty acids out of the circulation.
WHO risk categories
| Risk | Men | Women |
|---|---|---|
| Low | below 0.90 | below 0.80 |
| Moderate | 0.90 – 0.99 | 0.80 – 0.84 |
| High | 1.00 and above | 0.85 and above |
The thresholds differ by sex because the underlying physiology does: oestrogen promotes gluteofemoral storage, which is why women's ratios are lower at equivalent risk and why many women see their ratio rise after menopause without any change in weight.
Limitations
The ratio has one structural weakness: it is a fraction, so it can be moved by either number. Losing muscle from the glutes shrinks the hip measurement and worsens the ratio even though nothing about your abdominal fat has changed. Conversely a very muscular lower body can produce a flattering ratio despite a substantial waist.
For that reason many researchers now prefer waist-to-height ratio, which uses a denominator that cannot change, or simple waist circumference against absolute thresholds — 94 cm and 102 cm for men, 80 cm and 88 cm for women. The waist-to-hip ratio remains valuable chiefly for describing fat distribution, which is genuinely useful information the other measures do not give you.
Frequently asked questions
Can I change my body shape?
Not the underlying pattern, which is largely genetic and hormonal. You can reduce total fat, and visceral fat tends to respond first and fastest — so the ratio usually improves with weight loss even though the distribution preference stays. Spot reduction does not work.
Which is better, waist-to-hip or waist-to-height?
Waist-to-height, for predicting cardiometabolic risk. It has a fixed denominator, a single threshold for everyone, and generally performs at least as well in studies. Waist-to-hip is still the better descriptor of where fat is distributed.
Does the ratio change with age?
Usually upward. Muscle mass declines and fat redistributes centrally from middle age onwards, and in women the menopausal drop in oestrogen shifts storage from hips to abdomen quite markedly. Resistance training and adequate protein slow both processes.