Free BMI, Calorie & Health Calculators
Fast, accurate, and private. Calculate your BMI, daily calorie needs (TDEE), basal metabolic rate (BMR), and ideal weight in seconds. Every calculation runs entirely in your browser — no signup, no servers, no data collection.
BMI Calculator
Calculate your Body Mass Index from height and weight, with metric or imperial units, and see which WHO category you fall into.
Open calculator →Calorie Calculator
Find your daily calorie needs. Get BMR, TDEE, and a goal-adjusted target to maintain, lose, or gain weight.
Open calculator →BMR Calculator
Estimate your Basal Metabolic Rate using the Mifflin-St Jeor equation — the calories your body burns at rest.
Open calculator →Ideal Weight Calculator
See an estimated healthy weight range for your height and sex using the Devine formula — with its limits explained.
Open calculator →One click, no account, fully private
Every calculator here works the same way: type in your measurements, switch between metric (cm, kg) and imperial (ft·in, lb) at any time, and read your result instantly. There is nothing to install, no login, and no data is sent anywhere — the math runs in your browser. That makes these tools fast, free, and private, whether you are checking them once or every week.
What each tool does
- BMI calculator — a quick screening weight category (underweight / normal / overweight / obese).
- calorie calculator — daily calorie burn (TDEE) plus a goal-adjusted target to lose or gain weight.
- BMR calculator — the energy your body burns at complete rest.
- ideal weight calculator — a reference healthy weight range, with the caveats explained.
Helpful background
Numbers are just starting points. For a fuller picture, see our FAQ and the article Understanding BMI's Limitations. As always, these tools provide general estimates, not medical advice — speak with a qualified healthcare professional before making changes to your diet or activity.