Hub · Ratios, composition & face
Body Calculators Ratios, Proportions, Body Composition and Face Tools
Each calculator turns a few measurements into a number with context: what it means, how you compare and where the research thresholds are.
11 tools and guides · Updated
Health ratios
Simple tape-measure ratios that track fat around the middle better than weight alone.
Proportions and physique
CalculatorShoulder-to-Waist Ratio CalculatorYour V-taper ratio, compared with the golden ratio 1.618.
CalculatorShoulder-to-Hip Ratio CalculatorShoulder-to-hip ratio for men and women, with percentiles.
CalculatorBody Proportions CalculatorLeg length, arm span, head height and key body ratios in 3D.
CalculatorBody VisualizerBuild a rotatable 3D body from height, weight and measurements.
Body composition
Face
Photo-based tools that run in your browser; your photo is never uploaded.
Which calculator should I use?
| If you want to know… | Use |
|---|---|
| Whether your waist is a health risk | Waist-to-height ratio or waist-to-hip ratio |
| How muscular you are | FFMI calculator |
| What your body fat looks like | Body fat percentage chart |
| How strong your V-taper is | Shoulder-to-waist ratio |
| Whether your build is small, medium or large | Body frame size calculator |
| What a change in weight would look like | Body visualizer |
Body Calculators FAQ
Are these body calculators free?
Yes. Every calculator is free, needs no sign-up and runs in your browser, so the numbers you enter are not sent or stored.
What do I need to measure?
Most tools need a soft tape measure and one to three measurements, such as waist, hips, shoulders or wrist. The body measurement guide shows where to place the tape.
Which is better, waist-to-hip or waist-to-height ratio?
Both track belly fat. Waist-to-height ratio is simpler (keep your waist under half your height) and works for all sexes and heights; waist-to-hip ratio is the one the WHO uses for abdominal obesity.
Are the results medical advice?
No. They are screening estimates for general information. Talk to a doctor about any health concern.