Waist-to-Hip Ratio (WHR) Calculator
Assess cardiovascular health risk with your WHR score.
Waist-to-Hip Ratio
Divides waist by hip circumference to assess abdominal fat distribution and cardiovascular risk.
WHO classification: Low = low risk, Moderate = intermediate, High = substantially increased risk. For a more complete cardiometabolic risk picture, combine with blood pressure, fasting glucose, and a lipid panel — available via your GP.
About this calculator
Waist-to-hip ratio (WHR) measures fat distribution — specifically how much fat is stored around the abdomen versus the hips. Abdominal or "central" fat is metabolically more active and is strongly linked to cardiovascular disease, type 2 diabetes, and metabolic syndrome, even in people with a normal BMI. The WHO uses WHR thresholds to classify cardiovascular risk: low risk for men below 0.90 and women below 0.80; high risk at or above 1.0 (men) and 0.85 (women). WHR complements BMI by capturing fat distribution rather than just total weight.
How to interpret your results
A WHR below 0.80 (women) or 0.90 (men) indicates low cardiovascular risk from fat distribution. Between 0.80–0.85 (women) or 0.90–1.0 (men) is moderate risk — this is a signal to prioritise cardiovascular exercise and dietary improvements. Above 0.85 (women) or 1.0 (men) is the high-risk zone, associated with significantly elevated odds of hypertension, insulin resistance, and coronary artery disease. The practical response to a high WHR is targeting visceral fat reduction: aerobic exercise (particularly Zone 2 cardio), reduction of refined carbohydrates and alcohol, and adequate sleep — all of which specifically reduce central fat. Even modest WHR reduction (0.05 points) correlates with meaningful risk reduction.
The science and formula
WHR is calculated simply: waist circumference ÷ hip circumference. The WHO defined risk thresholds in the 1990s based on prospective epidemiological studies linking central adiposity to cardiovascular outcomes. The underlying mechanism is that visceral adipose tissue (VAT) — fat stored around the organs within the abdominal cavity — is metabolically distinct from subcutaneous fat. VAT releases higher levels of inflammatory cytokines (TNF-α, IL-6), free fatty acids, and adipokines that impair insulin signalling and promote arterial inflammation. WHR serves as a proxy for VAT because waist circumference correlates with visceral fat accumulation, while hip circumference (driven by gluteofemoral fat) is metabolically benign or even protective.
Important limitations
WHR captures fat distribution but not total fat mass — a very lean person could have a high WHR if their hip circumference is unusually small, without carrying excess visceral fat. Measurement variability is a significant issue: waist measurement site (navel versus narrowest point) can change WHR by 0.05–0.10. WHR does not adjust for height — a tall person and a short person with identical WHR have very different absolute waist sizes. For a complete cardiovascular risk picture, WHR should be combined with blood pressure, fasting glucose, HDL/LDL cholesterol, and waist circumference in absolute terms.
Frequently Asked Questions
What WHR is considered healthy for men and women?
According to the WHO, a healthy WHR for men is below 0.90 and for women below 0.80. A ratio above 1.0 for men or 0.85 for women indicates substantially increased cardiovascular risk.
Is WHR better than BMI for health risk?
Studies suggest WHR is a stronger predictor of cardiovascular events and type 2 diabetes than BMI, particularly because it captures where fat is stored rather than just total body mass. Many clinicians now use WHR alongside BMI for a more complete risk picture.
How does central fat increase health risk?
Visceral fat (stored around abdominal organs) releases inflammatory cytokines and free fatty acids that impair insulin sensitivity, raise blood pressure, and promote arterial plaque formation. People with "apple-shaped" body composition carry more visceral fat even at a normal body weight.
Can I reduce my WHR specifically, or only lose overall weight?
Visceral fat is preferentially mobilised during sustained aerobic exercise and calorie restriction, so targeted reduction of central fat is somewhat possible. High-intensity exercise, Zone 2 cardio, and reducing alcohol consumption specifically reduce visceral fat even with modest total weight loss.
Does WHR change with age?
Yes. As people age, fat tends to redistribute from peripheral to central deposits, increasing WHR even without weight gain. This shift is partly hormonal — declining oestrogen in women at menopause accelerates central fat accumulation. Maintaining resistance training and aerobic fitness slows this redistribution.
Should men and women use different WHR thresholds?
Yes. Women have a lower risk threshold (0.80 vs 0.90 for men) partly because they naturally carry proportionally more hip and gluteofemoral fat, making their baseline WHR lower. The same absolute WHR represents different levels of central adiposity relative to the individual's natural fat distribution pattern.
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