Health tool map

Body measures

Body size, composition, energy needs, and personal measurements.

Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.

A Body Shape Index Calculator

Calculate raw A Body Shape Index (ABSI) from waist circumference, height, and weight, with measurement and interpretation limits.

Estimate the body-fat percentage and age-band comparison produced by this page's encoded Army circumference model, with policy limitations.

Calculate adult BMI from metric or imperial height and weight, with screening categories, range math, and interpretation limits.

Estimate BMR with Mifflin-St Jeor and Harris-Benedict equations, then compare activity-adjusted daily energy estimates.

Estimate body surface area with the Mosteller BSA formula, see the exact height and weight conversions used, and understand clinical limitations.

Reproduce the historical Hamwi weight formula and frame-size multipliers as transparent arithmetic, not a health target.

Apply a named legacy calculator coefficient set to circumference entries and derive fat and lean mass without health-category claims.

Estimate daily protein, carbohydrate, and fat grams from Mifflin-St Jeor BMR, activity level, goal multiplier, and selected macro split.

Calculate waist-to-height ratio from matching units and report the raw ratio without diagnostic categories.