Body surface area, frame size, somatotype, and body index calculators. Browse our free anthropometrics tools below — all calculators are instant, accurate, and require no sign-up.
Abdominal Volume Index (AVI) Calculator — Calculate your Abdominal Volume Index from waist and hip circumference. AVI provides a geometric abdominal-volume estimate from tape-measure inputs.
A Body Shape Index (ABSI) Calculator — Calculate your A Body Shape Index (ABSI) from waist circumference, BMI, and height. ABSI provides a body-shape reference that has been studied alongside mortality risk.
Body Frame Size Calculator — Determine your body frame size (small, medium, or large) using the wrist circumference method and elbow breadth method. Adjust ideal weight targets based on frame size.
Body Surface Area (BSA) Calculator — Calculate body surface area using Du Bois, Mosteller, Haycock, Gehan-George, and Boyd formulas. Compare BSA results across common clinical reference methods.
Body Type Classifier — Somatotype Calculator — Classify your body type using the Heath-Carter somatotype method. Calculate your endomorph, mesomorph, and ectomorph scores from body measurements. Includes somatotype chart.
Broca Index Calculator — Calculate your ideal body weight with the Broca Index — one of the oldest and simplest height-to-weight formulas. Free online tool with sex adjustments.
Conicity Index Calculator — Calculate the Conicity Index to describe abdominal adiposity relative to body size. Uses waist circumference, weight, and height as a geometric reference.
Corpulence Index Calculator — Calculate the Corpulence Index (CI) — a height-cubed body-mass index related to the Ponderal Index. Compare CI with BMI for an alternative body-build assessment.
Ponderal Index Calculator — Calculate your Ponderal Index (PI) — mass divided by height cubed. PI is a proportionality reference used in adult and neonatal assessment.
Rohrer Index Calculator — Calculate the Rohrer Index (mass/height³) for pediatric and adult body proportionality assessment. Free online calculator with classification tables.