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Check your waist-to-hip ratio against WHO cut-offs
NNWA's waist-to-hip ratio calculator divides your waist circumference by your hip circumference, both in centimetres, and reads the result against World Health Organization (WHO) cut-offs: substantially increased metabolic risk at 0.90 and above for men and 0.85 and above for women. The page also explains the simpler Indian waist action levels: 90 cm for men, 80 cm for women.
Your waist-to-hip ratio is a single number — waist circumference divided by hip circumference — that describes where your body stores fat rather than how much of it you carry. Enter both measurements in centimetres below and the calculator returns your ratio instantly, read against the World Health Organization's cut-offs: 0.90 and above for men, 0.85 and above for women, the points at which metabolic risk is considered substantially increased.
The number matters more in India than in many places. South Asians tend to store fat around the abdomen at lower body weights, so central fat predicts cardiometabolic risk here better than body mass index alone. That is why this page also teaches the simpler Indian waist-circumference action levels — 90 cm for men, 80 cm for women — and why it works best alongside the BMI calculator rather than instead of it.
Waist-to-hip ratio — WHO cut-offs
Waist ÷ hip
0.80
Reading
Within range
WHO threshold for substantially increased metabolic risk: 0.85 for women. Waist alone also matters: the Indian action level is 80 cm — this waist is at or above it.
Measure the waist midway between the lowest rib and the top of the hip bone on a gentle exhale, and the hips at the widest point. Central fat predicts cardiometabolic risk in South Asians better than BMI alone.
Why practitioners measure the middle first01Measure before you calculate
The ratio is only as good as the tape work behind it, so measure carefully. For the waist, find the midpoint between your lowest rib and the top of your hip bone — the iliac crest — usually a little above the navel. Stand relaxed, breathe out gently, and take the reading at the end of that exhale, with the tape horizontal and snug against the skin but not compressing it.
For the hips, run the tape around the widest point of the buttocks, keeping it level all the way round. Take each measurement twice and average them if they differ. Enter both figures in centimetres: the calculator needs them in the same unit, though the ratio itself carries no unit at all.
02The formula and the WHO cut-offs
The arithmetic is deliberately simple: waist circumference divided by hip circumference. A waist of 88 cm over hips of 100 cm gives a ratio of 0.88. The calculator reads your result against the World Health Organization's cut-offs, at which metabolic risk is considered substantially increased: 0.90 and above for men, 0.85 and above for women.
Why a ratio rather than the waist alone? Dividing by hip circumference adjusts for frame size, so a broad-built person and a slight one are judged on fat distribution rather than sheer girth. A result below the cut-off is not a certificate of health, and one above it is not a diagnosis — it is a signal that abdominal fat deserves attention.
03The simpler Indian check: waist alone
If you only take one measurement, take the waist. For Indian adults the widely used action levels are 90 cm for men and 80 cm for women: cross those and abdominal fat is already worth acting on, whatever the ratio says. These cut-offs sit lower than the ones applied to European populations because South Asians tend to develop insulin resistance and related trouble at smaller waistlines.
Use the two checks together. Run the ratio here, then set your waist figure against the Indian levels on its own. If they disagree — a ratio under the WHO cut-off but a waist over the action level, say — treat the waist as the earlier warning. It is the more direct measure of the abdominal fat that matters.
04What this number cannot tell you
The waist-to-hip ratio is a screening measure, and an imperfect one. A tape cannot see visceral fat directly; it infers it from the surface. The ratio can also sit still while your body changes — lose fat from waist and hips together and the number barely moves, even though your health has improved. It is not validated during pregnancy, and it says nothing about blood pressure, blood glucose or lipids, which need actual tests.
Nor does any single measure settle the question. Body mass index misses fat distribution; this ratio misses total weight. Read them together — the BMI calculator is the natural companion screen — and let a borderline result prompt a proper check-up rather than a self-designed crash diet.
05From screening number to sensible plan
A trained nutrition counsellor treats a raised ratio as the start of an assessment, not the end of one. The next steps are unglamorous and effective: a diet history, a look at activity, sleep and stress, an energy target — the calorie calculator shows that arithmetic — and a food plan built around the household's actual kitchen, reviewed after weeks rather than days.
That process — measuring properly, interpreting against Indian cut-offs, then turning numbers into food someone will actually eat — is the substance of what NNWA teaches. The diploma in nutrition covers assessment from first principles, and the weight management programme concentrates on central fat specifically. Both lead to skill-enhancement certificates for coaching and education work, not clinical licences.
This result is a screening figure, not a diagnosis. A ratio or waist measurement above the cut-offs means the numbers deserve attention, not that anything is certainly wrong — and a result below them is not proof of health. If your figures sit above the thresholds, or you have symptoms or an existing condition, speak to a doctor or a qualified health professional before changing your diet.
What people ask about the waist-to-hip ratio
Expand any question to read the answer in full.
What is a healthy waist-to-hip ratio?
Under the World Health Organization's cut-offs, a ratio below 0.90 for men or 0.85 for women is not classed as substantially increased metabolic risk; at or above those points, it is. A result inside the range is reassuring but not a guarantee — Indian guidance also asks that waist circumference itself stay under 90 cm for men and 80 cm for women.
How do I measure my waist correctly?
Stand relaxed and find the midpoint between your lowest rib and the top of your hip bone, the iliac crest. Wrap the tape horizontally at that level, snug but not digging in, and take the reading at the end of a gentle breath out. Measure against skin or one thin layer of clothing, and repeat once to check the figure.
Where exactly do I measure my hips?
At the widest point of the buttocks, viewed from the side. Keep the tape level all the way round, parallel to the floor, and stand with feet together. A mirror or a second person helps. Use the same unit as your waist measurement — the calculator works in centimetres — because the ratio needs both figures in the same unit.
Is waist-to-hip ratio better than BMI?
They answer different questions. Body mass index compares weight with height and says how heavy you are for your frame; the waist-to-hip ratio says where the fat sits. In South Asians, central fat predicts cardiometabolic risk better than body mass index alone, so the ratio adds real information — but neither is sufficient by itself, and careful screening uses both.
Why are the Indian waist cut-offs lower than Western ones?
South Asians tend to carry more abdominal and visceral fat at a given body weight, and to develop insulin resistance at smaller waistlines. Indian guidance therefore sets action levels at 90 cm for men and 80 cm for women — lower than the levels used for European populations — so that problems are flagged earlier, when they are easier to act on.
Can I use inches instead of centimetres?
The calculator takes both measurements in centimetres, and because the ratio divides one figure by the other, the units cancel — what matters is that waist and hip are in the same unit. If your tape reads in inches, multiply each figure by 2.54 to convert before entering it. The Indian waist action levels of 90 cm and 80 cm are defined in centimetres.
Turn the arithmetic into a skill
A figure is the first five minutes of a consultation. These programmes teach what a practitioner does with it.
Diploma in Nutrition
Anthropometry — including exactly this waist and hip technique — is where the programme's assessment training begins.
Weight Management
Central fat is the problem this programme teaches you to assess and address through food and habit change.
Diabetes Nutrition
A raised ratio and insulin resistance travel together; this programme covers eating patterns for prevention and support.
A figure is not a diet plan
Turning a screening number into a chart someone will actually follow — for their condition, their kitchen and their budget — is the skill the Diploma teaches.