Sprint 7 Health Hub
Waist-to-Hip Ratio Calculator
Simple cardio-risk ratio.
Waist:Hip
0.40
How it works
Waist-to-hip ratio (WHR) is one of the strongest anthropometric predictors of cardiovascular disease and metabolic syndrome risk — more predictive than BMI for many populations. WHR measures where fat is distributed in the body: abdominal (visceral) fat (high waist measurement) carries significantly higher health risk than hip and thigh fat (peripheral fat). The Waist-to-Hip Ratio Calculator computes your WHR and interprets the health risk.
Formula: WHR = waist circumference ÷ hip circumference
Measure waist at the narrowest point (usually just above the belly button). Measure hips at the widest point (usually around the widest part of the buttocks). Use the same unit (both centimetres or both inches).
WHO risk categories: | Risk Level | Women | Men | |---|---|---| | Low risk | Below 0.80 | Below 0.90 | | Moderate risk | 0.80–0.85 | 0.90–0.95 | | High risk | Above 0.85 | Above 0.95 |
Why WHR predicts health risk better than BMI: Visceral fat (stored around abdominal organs) is metabolically active — it releases inflammatory cytokines, affects insulin sensitivity, and is associated with cardiovascular disease, type 2 diabetes, and hypertension. Peripheral fat (around hips and thighs) is less metabolically active and carries lower health risk. Two people with identical BMIs can have very different health profiles if one carries weight centrally and the other peripherally. WHR captures this distinction; BMI does not.
Complementary metric: waist-to-height ratio (WHtR) — keeping waist circumference below half your height (WHtR under 0.5) is a simple and evidence-backed guideline for healthy abdominal fat levels.
Privacy: all calculations run in the browser. No health data is transmitted.
Frequently Asked Questions
- For cardiovascular disease and metabolic syndrome risk, yes. Multiple large-scale studies (including the INTERHEART study of 27,000 people across 52 countries) show that waist-to-hip ratio is a better predictor of heart attack risk than BMI. WHR captures fat distribution — abdominal (visceral) fat carries much higher health risk than peripheral fat in the hips and thighs. BMI cannot distinguish fat distribution at all. Many health researchers argue WHR (or waist-to-height ratio) should replace BMI as the primary anthropometric screening tool.
- Waist measurement: take the measurement at the natural waist — the narrowest point of your torso, usually just above the belly button. Stand relaxed (don't suck in). The tape should be snug but not compressing tissue. Hip measurement: take the measurement at the widest point of your hips and buttocks — usually 7–9 inches (18–23cm) below your natural waist. The tape should pass around the widest circumference of your glutes. Measure each location twice and average if they differ by more than 0.5cm.
- 'Apple-shaped' refers to central (android) fat distribution — carrying more weight around the abdomen, resulting in a higher WHR. This pattern is more common in men and post-menopausal women and is associated with higher visceral fat accumulation and elevated cardiometabolic risk. 'Pear-shaped' refers to peripheral (gynoid) fat distribution — carrying more weight in the hips, thighs, and buttocks, resulting in a lower WHR. This pattern is more common in premenopausal women and is associated with lower cardiometabolic risk. The shape is largely determined by genetics and hormonal factors.
- Yes, but the specific type of exercise matters. Visceral fat (which raises WHR) is highly responsive to aerobic exercise — consistent Zone 2 and Zone 3 cardiovascular training reduces visceral fat preferentially over subcutaneous fat. Studies show 8–12 weeks of regular moderate-to-vigorous aerobic exercise reduces WHR by 0.02–0.05 on average. Resistance training builds hip and glute muscle, which can reduce WHR by increasing the denominator. Diet-driven weight loss also preferentially reduces visceral fat.