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Both calculators run independently — change the inputs on either side to compare results.

Health

Waist-to-Hip Ratio Calculator

Divides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs.

Fitness

BMI Calculator

Calculate Body Mass Index (BMI) — body weight in kg divided by height in metres squared — to screen for under/overweight categories. The most widely used population-level fitness and health risk metric, with known limitations for athletes and unusual body compositions.

Underweight<18.5Normal18.5–25Overweight25–30Obese I30–35Obese II+35+

Key differences

Waist-to-Hip Ratio CalculatorBMI Calculator
CategoryHealthFitness
Inputs required22
ResultWaist-to-Hip RatioYour BMI
What it doesDivides your waist circumference by your hip circumference to gauge how body fat is distributed — a strong, simple predictor of cardiometabolic risk. A higher ratio indicates more abdominal ("apple-shaped") fat, which carries greater health risk than fat stored on the hips and thighs.Calculate Body Mass Index (BMI) — body weight in kg divided by height in metres squared — to screen for under/overweight categories. The most widely used population-level fitness and health risk metric, with known limitations for athletes and unusual body compositions.