Body Composition

BMI, BMR, body fat, lean mass and body measurements.

• BMI Calculator Body mass index, BMI Prime and the healthy weight range for your height.
• BMR Calculator Basal metabolic rate from the Mifflin-St Jeor equation, with Harris-Benedict alongside.
• Body Adiposity Index Calculator Estimates body fat percentage from hip circumference and height, without a weight.
• Body Fat Calculator (US Navy Method) Estimates body fat percentage from height, neck, waist and hip measurements.
• Body Frame Size Calculator Small, medium or large frame from your height and wrist circumference.
• Body Surface Area Calculator Body surface area from height and weight, using the Mosteller and Du Bois formulas.
• FFMI Calculator (Fat-Free Mass Index) Fat-free mass index from height, weight and body fat, normalised to a height of 1.8 m.
• Ideal Weight Calculator Devine, Robinson, Miller and Hamwi estimates side by side, with the healthy BMI range for your height.
• Lean Body Mass Calculator Lean body mass from the Boer formula, and from a known body fat percentage.
• Skinfold Body Fat Calculator (Jackson-Pollock 3-Site) Body density and body fat percentage from three caliper skinfolds, using the Jackson-Pollock and Siri equations.
• TDEE Calculator Total daily energy expenditure from your BMR and activity level.
• Waist-to-Height Ratio Calculator Your waist-to-height ratio, its NICE band and the waist size that keeps it under 0.5.
• Waist-to-Hip Ratio Calculator Your waist-to-hip ratio compared with the WHO cut-off for abdominal obesity.