Measure your central obesity risk with the most accurate simple body composition metric. Unlike BMI, the WHtR directly targets abdominal fat — the type most linked to cardiovascular disease and metabolic disorders.
Waist-to-height ratio (WHtR) divides waist circumference by height using the same units (both cm or both inches). It targets central adiposity linked to cardiometabolic risk. A commonly cited public-health threshold is keep waist below half your height — WHtR below 0.5. Bands often classify under 0.4 as very low central risk, 0.4–0.49 as healthy, 0.5–0.59 as increased concern, and 0.6+ as high central obesity risk. Measure waist at the midpoint between the lowest rib and iliac crest, standing relaxed after normal exhale. WHtR may flag risk in individuals with normal BMI but excess visceral fat. Central adiposity correlates with cardiometabolic risk even when overall BMI appears normal, which is why WHtR adds useful context. Postpartum recovery and certain medications can invalidate standard waist interpretation temporarily. Consistent measurement technique at the same time of day improves comparability across retests.
Worked example: Waist 82 cm and height 170 cm: WHtR = 82 ÷ 170 = 0.482 — below the 0.5 cutoff, often interpreted as lower central adiposity risk for adults.
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Central fat is the most dangerous type — here's how to reduce it.
Unlike subcutaneous fat (under the skin), visceral fat wraps around your organs. It releases inflammatory molecules that raise blood pressure, impair insulin sensitivity, and increase cardiovascular risk more than any other fat depot.
Research across 300,000+ people shows WHtR predicts cardiovascular risk, diabetes, and all-cause mortality better than BMI. The 0.5 threshold is accurate across different heights, ethnicities, and ages.
Visceral fat is metabolically active and responds faster to caloric deficit and exercise than subcutaneous fat. Even a 5–10% reduction in waist circumference can dramatically improve metabolic markers.
WHtR complements BMI by focusing on fat distribution. A ratio above 0.5 suggests reviewing diet, activity, and clinical markers such as blood pressure and lipids — especially if waist has risen while weight stayed stable. Ethnicity-specific guidance may apply in some clinical settings.
Everything about WHtR and central body fat.
Keep your waist to less than half your height. A ratio below 0.5 is healthy for adults of all ages and backgrounds. Between 0.4 and 0.49 is optimal. Below 0.4 may indicate underweight.
Yes. Unlike many body composition tools, WHtR uses the same healthy threshold (0.5) for both men and women. Women naturally carry more fat around the hips, but the waist-to-height relationship remains a strong cardiometabolic predictor for both sexes.
Visceral fat responds relatively quickly to lifestyle changes. A 500 kcal/day deficit plus 3× weekly aerobic exercise typically reduces waist circumference by 2–4 cm within 8–12 weeks, noticeably improving your WHtR.
Waist circumference primarily reflects fat tissue. Unlike BMI, WHtR is not significantly affected by high muscle mass. A muscular person with low abdominal fat will have a healthy WHtR even if their BMI is elevated.
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Browse All Tools →This calculator gives a general estimate for education and planning. It is not a medical diagnosis and does not replace advice from a qualified healthcare professional. Talk to your doctor before acting on these results — especially if you are pregnant, under 18, or managing an existing medical condition.