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BMR Calculator

Estimate the calories your body burns at rest, using the Mifflin-St Jeor formula.

Inputs

years
years

kg
kg

cm
cm

Saved Scenarios

— select 2+ to compare

Your BMR

1,370

Spark says

How it's calculated

Formula

BMRmen=10w+6.25h−5a+5BMRwomen=10w+6.25h−5a−161BMR_{men} = 10w + 6.25h - 5a + 5 \quad\quad BMR_{women} = 10w + 6.25h - 5a - 161
w
— Weight in kilograms
h
— Height in centimetres
a
— Age in years

What is the BMR Calculator?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic functions like breathing and circulation while at complete rest.

How to use it

  1. 1 Select your gender.
  2. 2 Enter your age, weight and height.
  3. 3 Read your estimated BMR.

Worked examples

30-year-old woman, 65kg, 165cm

BMR is approximately 1,401 calories per day.

Try it

Limitations

  • •Formula-based estimates vary by individual body composition and can be off by 10% or more.

Frequently asked questions

What's the difference between BMR and calorie needs?

BMR is calories burned at complete rest. Total daily calorie needs multiply BMR by an activity factor to account for movement and exercise.

Sources & references