BMR Calculator
The BMR Calculator estimates how many calories your body needs at rest to maintain essential functions like breathing and circulation. Knowing your Basal Metabolic Rate supports your medical weight loss plan and helps you tailor your daily calorie intake for efficient results.
BMR Calculator
Enter your details below to find your BMR
years
ft
in
lbs
Your BMR
0
calories / day at rest
This is roughly what your body burns doing nothing at all. Multiply it by an activity level (see our TDEE Calculator) to find your full daily calorie needs.
About the BMR Calculator
What is BMR?
Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest just to keep essential functions running — breathing, circulation, cell production, and temperature regulation. It represents the largest share of most people’s total daily calorie burn.
Knowing your BMR gives you a baseline for building a nutrition plan. It answers "how many calories would I burn today if I did nothing at all?" — a number your Total Daily Energy Expenditure (TDEE) then builds on top of.
How is BMR calculated?
This calculator uses the Mifflin-St Jeor equation, widely considered one of the most accurate BMR formulas for the general population. It combines your weight, height, age, and sex.
Formula (Mifflin-St Jeor)
Men: 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5
Women: 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161
Example: 30-year-old woman, 143 lb, 5’5" → BMR ≈ 1,398 calories/day
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