Compute body surface area with four formulas (Mosteller, Du Bois, Haycock, Gehan & George) for medication dosing and physiology. Get m² from height and weight — free, local, informational only.
Compute healthy weight range with Devine and Robinson formulas from height. See a 170 cm target band instantly — free, local, informational only.
Estimate lean body mass from weight and height with Boer and James formulas averaged — the number training actually moves. Track muscle, not just scale weight — free, local, informational only.
Compute children's BMI from height and weight with metric/imperial inputs and a healthy-range readout for growth tracking. See where a 10-year-old sits — free, local, informational only.
Rasterize SVG vectors to crisp PNGs at 1x, 2x (default), 3x, or 4x scale — base size read from the SVG width/height attributes (100px fallback) — with filename preservation (.svg becomes .png). Developers ship full icon sets in four runs — local Canvas work, 2 free batches a day.
Build bar, line, pie, doughnut, area, and horizontal-bar charts from a label/value table (minimum 2 rows) with 10 ten-color palettes, title/axis labels, background, and labels/legend toggles. Canvas renders at device-pixel-ratio sharpness, width 400–2000px, height 300–1200px — exports PNG named after your title.
Drug dosing (especially chemotherapy), burn assessment, and cardiac index — where body size scales treatment. Average adults land near 1.7–1.9 m².
0.007184 × weight^0.425 × height^0.725 — the clinical standard for a century. The tool computes it exactly, alongside Mosteller, Haycock, and Gehan & George plus their average: 70 kg / 170 cm reads 1.82 / 1.81 / 1.83 / 1.83, averaging 1.82 m².
No — informational only. Dosing decisions belong to clinicians with full patient context.
No — math runs locally in your browser. Health data never leaves your device.
BMI Calculator
Computes Body Mass Index from metric or imperial height and weight inputs, categorizing the result into underweight, normal, overweight, and obese, with a healthy weight range for your height. Health data never leaves your device — every calculation runs locally in your browser.
BMR Calculator
Calculates Basal Metabolic Rate using the Mifflin-St Jeor equation with age, sex, height, and weight. Nutritionists use it for diet planning. Health data never leaves your device — every calculation runs locally in your browser.
Last updated October 2026