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Waist-to-Hip Ratio Calculator.

Waist-to-hip ratio from your measurements, checked against the WHO risk thresholds for men and women.

Waist-to-hip ratio

Body shape pattern

WHO threshold used

This is a screening ratio, not a diagnosis. Waist-to-hip ratio is one indicator among several — including BMI, waist circumference alone, and body fat percentage — and none of them replace a clinical assessment.

Runs entirely in your browser. The values you enter never leave your device — there is no request to our server and nothing is stored. How we handle data

The Ratio and the WHO Thresholds

Waist-to-hip ratio divides waist circumference by hip circumference, in the same unit for both. It exists because two people can share an identical body mass index while carrying their weight in very different places, and where that weight sits changes the health picture independent of how much of it there is.

Formula

Waist-to-Hip Ratio = Waist Circumference ÷ Hip Circumference
Substantially increased risk: > 0.90 (men)  |  > 0.85 (women)

These thresholds come from the World Health Organization's 2008 expert consultation on waist circumference and waist-hip ratio, which set separate cutoffs by sex because typical fat distribution differs between men and women even at the same overall body composition.

Why Fat Distribution Matters Independent of BMI

Fat stored viscerally, around the abdominal organs, behaves differently from fat stored subcutaneously around the hips and thighs. Visceral fat is more metabolically active, releasing more of the fatty acids and inflammatory signals implicated in insulin resistance and cardiovascular disease — which is why an apple-shaped fat distribution carries more risk than a pear-shaped one at the same total body mass.

Measure at the narrowest and widest points

Waist at the narrowest point of the torso, usually near the navel; hip at the widest point around the buttocks. Measuring at inconsistent points is the most common source of an inaccurate ratio.

Keep the tape snug, not tight

A tape pulled tight enough to compress soft tissue understates both measurements and distorts the ratio less predictably than a consistent, snug fit.

Track the trend, not one reading

A single measurement is a snapshot. Measuring at the same time of day, at the same point on the body, every few weeks gives a far more reliable picture of whether the ratio is actually changing.

What This Ratio Does Not Tell You

Waist-to-hip ratio is one screening signal, not a diagnosis, and it does not distinguish visceral fat from subcutaneous fat directly — it only infers a distribution pattern from two circumference measurements. It is best read alongside BMI, waist circumference on its own, and body fat percentage, and none of these substitutes for a clinical evaluation where one is warranted.

Knowledge Base

Waist-to-Hip Ratio and Cardiometabolic Risk Methodology.

Waist-to-hip ratio adds a dimension BMI cannot see: where the body stores fat, not just how much of it there is. The World Health Organization's thresholds — 0.90 for men, 0.85 for women — mark the point past which abdominal fat distribution is associated with substantially increased cardiometabolic risk.

The Calculation Branch

WHR = Waist circumference ÷ Hip circumference | Elevated risk: WHR > 0.90 (men) or > 0.85 (women), per WHO (2008)

Industrial Standards.

This tool divides an entered waist measurement by an entered hip measurement, in either centimetres or inches (the unit cancels out in the ratio, so either works as long as both measurements use the same one), and compares the result against the WHO risk threshold for the selected sex. It also reports a body-shape descriptor — apple, pear, or balanced — as a plain-language read of the same ratio, not an additional clinical measure.

In-Depth Analysis & Reference Data

Waist-to-hip ratio was widely used in cardiovascular risk research before waist circumference alone became the more commonly cited single measure in some clinical guidelines, largely because it requires only one measurement rather than two. The ratio has not been superseded by waist circumference alone, however — the two capture related but distinct information, and several major studies have found waist-to-hip ratio a stronger predictor of cardiovascular events than BMI across a wide range of body sizes.

The WHO thresholds apply at the population level and were derived from studies correlating the ratio with cardiovascular outcomes across large cohorts. An individual result above the threshold is a signal worth discussing with a healthcare provider alongside other risk factors — family history, blood pressure, lipid profile — rather than a standalone diagnosis of disease.

Registry Questions & FAQ.

Is waist-to-hip ratio more accurate than BMI?

They measure different things, so neither replaces the other. BMI reflects total body mass relative to height; waist-to-hip ratio reflects where fat is distributed. Several studies have found waist-to-hip ratio a stronger predictor of cardiovascular risk than BMI, particularly in people whose BMI sits in the normal range while still carrying disproportionate abdominal fat.

Can waist-to-hip ratio change without changing my weight?

Yes. Fat distribution shifts with age, hormonal changes, and activity type — resistance training that builds hip and glute muscle, for example, can lower the ratio even at a stable body weight, since it changes the denominator without changing the numerator.

All metrics verified against ISO/ASTM benchmarks.