Body Indices Calculator

Calculate BMI, Corpulence Index, WHR, WHtR, ideal weight, and body fat percentage from your measurements.

Metric (kg / cm) Imperial (lb / in)

Male Female

Age

Weight (kg)

Height (cm)

Optional – needed for WHR, WHtR, and body fat (Navy method)

Waist (cm)

Hip (cm)

Neck (cm)

How to use the Body Indices Calculator

Choose metric or imperial units and your biological sex.
Enter your age, weight, and height – primary indices calculate automatically.
Add waist, hip, and neck measurements for WHR, WHtR, and body fat estimates.

Understanding the indices

BMI (Body Mass Index) – weight / height². Simple but does not account for muscle mass.
Ponderal Index (Corpulence Index) – weight / height³. More accurate for very tall or short individuals.
WHR (Waist-to-Hip Ratio) – waist ÷ hip. Risk threshold: >0.90 (men), >0.85 (women).
WHtR (Waist-to-Height Ratio) – waist ÷ height. Values above 0.5 indicate elevated cardiovascular risk.
Navy body fat method – uses circumference measurements. Accuracy ±3–4% vs DEXA.