More than a calculator.
A health dashboard.
BMI Tracker gives you 7 health metrics in one place — BMI, body fat, ideal weight, healthy weight range, calorie targets, hydration and protein needs. All updating live as you adjust the sliders. Free, private, no signup.
7 Health Metrics
BMI, body fat %, ideal weight, healthy weight range, calorie targets, daily hydration and protein — all from a single set of inputs.
Live Updates
Every metric updates in real time as you move the sliders. No calculate button, no page reload.
Private by Design
All calculations run in your browser. Your height, weight, age and sex are never sent to any server or stored anywhere.
Metric & Imperial
Switch between metric (cm / kg) and imperial (in / lbs) instantly. All 7 metrics update together.
WHO Standards
BMI classification follows World Health Organization guidelines. Calorie needs use the Mifflin-St Jeor equation (1990).
Cited Formulas
Body fat uses Deurenberg et al. (1991). Ideal weight uses Devine (1974). Hydration per EFSA guidelines. Every number is sourced.
Questions or feedback?
We'd love to hear from you. Send us a message and we'll get back to you as soon as possible.
✉ hello@bmitracker.xyzAlso from us: Find My Age — your exact age in years, months, days and seconds, live. · Movie Roulette — can't decide what to watch? Let fate decide.