BMR Calculator
Find out how many calories your body burns at rest each day — your Basal Metabolic Rate. This is the starting point for any calorie plan.
BMR Calculator
Calories your body burns at rest, using the Mifflin-St Jeor equation.
Calories your body burns at complete rest each day. Multiply by an activity factor (1.2–1.9) to estimate your total daily energy expenditure.
More health calculators
BMIBMI CalculatorCALCalorie CalculatorBF%Body Fat CalculatorIBWIdeal Weight CalculatorPROProtein Intake Calculator
Need another tool?
Browse all ten health calculators — calories, sleep, protein and more.
How to use this calculator
Choose your gender, enter your age, weight and height, then press Calculate. Your BMR appears straight away, together with daily calorie estimates for lightly and moderately active lifestyles.
Formula
Mifflin-St Jeor equation. Men add 5; women subtract 161. Example on this page (male, 30 years, 70 kg, 175 cm): 10 × 70 + 6.25 × 175 − 5 × 30 + 5 = 1,649 kcal per day.
Frequently asked questions
What is BMR?
BMR (Basal Metabolic Rate) is the number of calories your body needs each day just to keep you alive at rest — breathing, circulation, cell production and so on.
How is BMR different from TDEE?
TDEE (Total Daily Energy Expenditure) is your BMR plus the calories you burn through activity. Multiply your BMR by an activity factor (1.2–1.9) to estimate TDEE — see our Calorie Calculator.
Does BMR change with age?
Yes. BMR slowly falls as you age, mostly because muscle mass decreases. Strength training helps to keep muscle — and BMR — higher as you age.