Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) and assess health risk for cardiovascular disease.
WHR and Health Risk
The World Health Organization defines abdominal obesity as WHR above 0.90 for males and 0.85 for females. Higher ratios indicate more abdominal fat (apple shape), which is associated with greater risk of cardiovascular disease, type 2 diabetes, and metabolic syndrome compared to lower body fat (pear shape).
About This Tool
Computes waist-to-hip ratio (WHR) by dividing waist circumference by hip circumference. WHR is associated with cardiovascular and metabolic disease risk, with higher ratios indicating central (abdominal) fat distribution.
WHO classification: low risk for men is below 0.90, women below 0.85. Moderate risk extends to 0.99 for men and 0.89 for women. Above those thresholds risk is considered high. Measurement standards: waist at narrowest point, hips at widest point of buttocks.
The clinical basis for WHR as a risk indicator rests on the biological distinction between visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT). VAT surrounds internal organs and is metabolically active, secreting inflammatory cytokines and free fatty acids that drive insulin resistance, dyslipidemia, and atherosclerosis. SAT (the fat under the skin in hips, thighs, and buttocks) is comparatively inert. WHR captures the VAT-to-SAT ratio crudely but effectively: high WHR signals an "apple" body shape (central fat), low WHR signals a "pear" shape (peripheral fat).
The cardiovascular evidence is substantial. The INTERHEART study (2005, 27,000 subjects across 52 countries) found WHR predicted heart attack risk more accurately than BMI across all ethnic groups. Each WHR quintile increase produced a 33% higher risk of myocardial infarction. BMI's predictive power was weaker, particularly in non-European populations where high VAT can occur at normal BMI.
A worked example: a 38-inch waist with 42-inch hips produces a WHR of 0.905. For a male, this is borderline-moderate risk. Interpretation: the abdominal fat distribution suggests metabolic risk regardless of total weight. Reducing waist by 2 inches (to 36 inches) drops WHR to 0.857, into the low-risk range — an outcome typically achievable with 8–15 lb of total weight loss, given that visceral fat mobilizes preferentially during caloric deficit.
WHR responds disproportionately to lifestyle change. A 10% body weight loss commonly produces 5–8% WHR improvement because visceral fat is mobilized first. Resistance training adds further benefit by increasing peripheral muscle mass at the hips and thighs, which can lower WHR even without weight change. The combination of moderate caloric deficit and strength training is the most effective single intervention.
Limitations: WHR thresholds were established primarily from European-ancestry populations and underestimate risk in South Asian, East Asian, and some Hispanic populations who carry more visceral fat at lower body weights and lower WHR values. WHO and many clinical bodies now publish ethnicity-specific cutoffs. WHR also does not distinguish between fat and muscle — a powerlifter with a developed midsection may have a high WHR without elevated visceral fat. Combined with body fat percentage and a basic metabolic panel, WHR becomes a more reliable signal.
The about text and FAQ on this page were drafted with AI assistance and reviewed by a member of the Coherence Daddy team before publishing. See our Content Policy for editorial standards.