Waist-to-Hip Ratio Calculator
Divide your waist by your hip measurement to see your risk category.
How to use
- Measure your waist at the narrowest point and your hips at the widest point.
- Enter both measurements.
- Click Calculate to see your ratio and risk category.
For information only — not medical advice. Consult a healthcare professional for personal guidance.
What Is a Waist-to-Hip Ratio Calculator?
Where you carry fat matters at least as much as how much you carry. Fat stored around the abdomen (an "apple" shape) is metabolically active visceral fat, strongly linked with diabetes and cardiovascular disease, while fat stored at the hips and thighs (a "pear" shape) carries far less risk. The waist-to-hip ratio (WHR) captures that distribution in a single number — waist circumference divided by hip circumference — and this calculator computes it from two tape measurements and your gender.
WHR earned its place in medicine because it predicts risk in people whom BMI misjudges in both directions: the muscular person flagged "overweight" by BMI but with a trim waist, and the normal-weight person with a large abdomen whose BMI looks reassuring. Large population studies consistently find WHR a stronger predictor of heart attack risk than BMI alone, which is why the World Health Organization publishes official risk cutoffs for it.
How to Use the Waist-to-Hip Ratio Calculator
- Select your gender — risk thresholds differ for men and women.
- Measure your waist and enter it in centimeters or inches: stand relaxed, tape midway between your lowest rib and the top of your hip bone (or at the navel), and measure after a normal breath out.
- Measure your hips at their widest point around the buttocks, tape level and snug.
- Click Calculate to see your ratio and its risk category.
Reading Your Ratio
The WHO classifies abdominal obesity as a WHR above 0.90 for men and above 0.85 for women — thresholds beyond which the risk of type 2 diabetes, heart disease, and stroke is considered substantially increased. Comfortably below those lines, risk is progressively lower. The practical way to use the number: know which side of your gender's WHO cutoff you are on, and track the direction over months rather than chasing decimal points week to week.
Tips for Measuring and Improving
- Measure in the morning, over bare skin or thin clothing, standing with weight evenly distributed — posture and a full stomach move the waist reading.
- You cannot spot-reduce belly fat, but total fat loss shrinks the waist preferentially early on, so WHR often improves fast in the first months of a sensible program.
- Sleep, alcohol, and chronic stress all promote central fat storage specifically — lifestyle levers improve this ratio beyond what calories alone would predict.
Is waist-to-hip ratio better than BMI?
They answer different questions: BMI estimates total mass for height; WHR describes fat distribution. For predicting cardiovascular and metabolic risk, studies generally favor WHR (and waist circumference) because visceral fat is the dangerous depot. Used together they are better still — a high BMI with a low WHR is a different risk picture from high values on both.
What is a good waist-to-hip ratio?
Below the WHO abdominal-obesity cutoffs — under 0.90 for men and under 0.85 for women — is the core target, with lower values within the healthy range associated with incrementally lower risk in population studies. Ratios around 0.7 for women and 0.85–0.9 for men are typical of lean, active populations; genetics shape the floor any individual can reasonably reach.
Why do men and women have different thresholds?
Because healthy fat distribution differs by sex. Estrogen directs storage toward hips and thighs in women, so a given waist represents relatively more abdominal fat in a woman than in a man; testosterone patterns in men favor abdominal storage earlier. The cutoffs are calibrated so that each corresponds to a similar level of metabolic risk within that sex's population data.
My weight is normal but my ratio is high. Should I worry?
This pattern — sometimes called "normal weight central obesity" — is a real and recognized risk profile, not a measurement error. The response is not to lose weight indiscriminately but to change composition: resistance training to add muscle, regular aerobic activity (which preferentially mobilizes visceral fat), adequate sleep, and moderated alcohol. Mention it at your next checkup so blood sugar and lipids get tested too.