About
About BMI Health Metrics
BMI Health Metrics is a free, calculator-first health tool that helps you estimate BMI, ideal weight, BMR, TDEE and daily nutrition targets — right in your browser. We built it to be precise, private and fast, with support for metric, imperial and both-units side by side.
What we do
Calculate BMI from height and weight and see where you fall on the WHO BMI chart and BMI ranges. Get your ideal weight range, estimated BMR and TDEE, calorie targets for maintaining, losing or gaining weight, and macro targets for protein, carbs and fat — synced with your calorie goal. Fiber guidance and daily water intake are included as practical everyday helpers.
How it works
All calculations run locally in your browser. Your measurements, history and preferences are stored in local storage — no account, no server, no tracking. BMR uses the Mifflin-St Jeor equation; TDEE multiplies BMR by an activity factor. Every result is an estimate to support planning, not a medical measurement.
Why we built it
Many calculators are cluttered, ad-heavy or require sign-ups. We wanted a clean, modern all-in-one tool that respects privacy and works on any device — phone, tablet or desktop, portrait or landscape. Results update live as you type, history stays on your device, and you can switch units per field without losing context.
Our principles
- User experience first — calculator remains at the top, no walls of text.
- Accuracy with honesty — we show formulas and note that BMI does not directly measure body fat and that BMR/TDEE are estimates.
- Privacy by design — no data leaves your device. Clear the history anytime.
- Accessible and fast — keyboard shortcuts, high contrast, and instant feedback.
Note: This tool provides information only and is not medical advice. For personal guidance, talk to a clinician.