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 predicts abdominal fat volume and metabolic syndrome risk.
A Body Shape Index (ABSI) Calculator — Calculate your A Body Shape Index (ABSI) from waist circumference, BMI, and height. ABSI predicts mortality risk independent of BMI.
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 for accurate drug dosing and clinical assessment.
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 measure abdominal obesity independent of BMI. Uses waist circumference, weight, and height to assess metabolic risk.
Corpulence Index Calculator — Calculate the Corpulence Index (CI) — the reciprocal of the Ponderal Index. Compare CI with BMI for a height-independent body mass assessment.
Ponderal Index Calculator — Calculate your Ponderal Index (PI) — mass divided by height cubed. Better than BMI for very tall or short individuals and used in neonatal assessment.
Rohrer Index Calculator — Calculate the Rohrer Index (mass/height³) for pediatric and adult body proportionality assessment. Free online calculator with classification tables.