Calculate your Basal Metabolic Rate — calories your body burns at complete rest.
A BMR calculator tells you how many calories your body burns just staying alive — breathing, pumping blood, keeping your organs running — before you've moved a muscle on purpose. It's the number nutritionists and trainers start with before building any diet or workout plan. Enter your age, gender, weight, and height, and the calculator estimates your basal metabolic rate using the Mifflin-St Jeor formula, which is the version most dietitians trust today.
You can't plan a calorie deficit or surplus without knowing your baseline first. A lot of people jump straight into 'eat 1500 calories a day' advice they read online without realizing that number might be way off for their actual body. This tool fixes that by giving you a personalized starting point instead of a generic guess.
The formula factors in your weight, height, age, and gender because metabolism naturally slopes down as we age and differs by body composition between men and women. For example, a 30-year-old man weighing 75kg at 178cm would land around 1,730 calories a day just for basic bodily function — before any walking, gym, or daily activity is added on top.
Basal Metabolic Rate is the number of calories your body needs at complete rest just to keep functioning — heart, lungs, brain, and cell repair.
No. BMR is your resting burn only. TDEE adds your daily activity level on top of BMR to give your full daily calorie need.
It uses the Mifflin-St Jeor equation, which most nutritionists consider more accurate than the older Harris-Benedict formula.
Yes — knowing your BMR helps you set a realistic calorie deficit instead of guessing, which usually leads to slower, more sustainable results.
Yes, muscle burns more calories than fat even at rest, so two people with the same weight can have slightly different actual BMRs.