BMI&BodyProportionAnalysis

Know your number. Understand what it does and doesn't mean.

Body Composition Science · BMI in Context

Your BMI.
The full picture.

BMI is a validated population tool — it has genuine clinical value and works well for most people. Where it struggles is distinguishing fat from muscle, and it can't tell you where fat is stored. This calculator adds waist-based measurements so you can see the full picture and know when to trust your number.

BMI validatedWaist-to-Height RatioWaist-to-Hip RatioCentral fat detection

Your measurements

Enter your stats

Height and weight are required. Waist and hip add precision — all you need is a tape measure.

Required

Used to calculate your BMI.

Gender

Height (cm)Weight (kg)

Optional — but better

Optional

A tape measure gives you far more useful data than body fat guesswork.

Waist circumference (cm)Measure at the narrowest point, roughly at the navel. Enables Waist-to-Height Ratio.Hip circumference (cm)Measure at the widest point of your hips. Enables Waist-to-Hip Ratio.

Why waist measurements?

Body fat % is hard to measure accurately at home. Waist circumference is not — it takes 30 seconds and a tape measure. Research consistently shows waist-based ratios predict metabolic and cardiovascular risk better than BMI alone.

BMI&BodyProportionAnalysis

Your BMI.The full picture.

Enter your stats

Your BMI.
The full picture.