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Waist to Height Ratio Calculator

Calculate your Waist-to-Height Ratio (WHtR) — a stronger predictor of cardiovascular disease, diabetes, and hypertension risk than BMI. Free tool with risk category and targets. Supports cm and inches.

WHtR Calculator

WHtR = Waist ÷ Height · Target: < 0.5

Unit System
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Waist-to-Height Ratio

The simple rule: keep your waist less than half your height. WHtR below 0.5 is associated with significantly lower risk of heart disease, type 2 diabetes, hypertension, and all-cause mortality compared to WHtR above 0.5. Unlike BMI, WHtR specifically captures dangerous visceral abdominal fat.

WHtR Risk Categories

WHtRCategoryHealth Risk
< 0.40Very LeanLow — possible underweight risk
0.40 – 0.50HealthyLow cardiovascular risk ✓
0.50 – 0.60OverweightModerate — increased metabolic risk
> 0.60ObeseHigh cardiovascular & diabetes risk

Why WHtR Outperforms BMI for Health Screening

Unlike BMI, which simply divides weight by height squared, WHtR specifically measures central (abdominal) adiposity — the fat type most strongly linked to insulin resistance, type 2 diabetes, hypertension, and cardiovascular events. Multiple large-scale studies (including a 2012 meta-analysis of 300,000 subjects) showed WHtR was a stronger predictor of cardiometabolic risk than BMI. The message is simple: keep your waist to less than half your height. No age or sex adjustments required.

Frequently Asked Questions

For predicting cardiovascular disease and metabolic syndrome, WHtR is consistently stronger than BMI across multiple large-scale studies. BMI cannot distinguish abdominal fat from muscle or fat in other areas. WHtR specifically measures central obesity — the fat most strongly linked to insulin resistance, hypertension, and cardiovascular disease. The NHS and many endocrinologists now recommend WHtR over BMI for health screening.
Your target waist circumference = your height × 0.5. For a person 180 cm tall: target waist ≤ 90 cm. For a 165 cm tall person: target ≤ 82.5 cm. Additionally, absolute waist thresholds (WHO): ≥94 cm (men) and ≥80 cm (women) = increased risk; ≥102 cm (men) and ≥88 cm (women) = substantially increased risk.
Waist reduction comes primarily from fat loss through caloric deficit and exercise. Abdominal visceral fat is particularly responsive to aerobic exercise and caloric restriction. Strength training preserves muscle during a deficit. Spot reduction (e.g. doing crunches) does not reduce waist fat — total body fat loss is the only effective approach. Even a 5–10% reduction in body weight significantly reduces central adiposity.
Yes — toggle the unit selector to Imperial (in) and enter your waist and height in inches. The calculator converts both values to cm internally before dividing. The ratio result (WHtR) is dimensionless, so it's the same regardless of whether you measure in cm or inches. European users typically measure in cm; US users in inches.

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