BMR Calculator
Calculate your BMR (calories burned at rest) with the accurate Mifflin-St Jeor equation, then see the daily calories you need to maintain weight at every activity level. Free, metric & imperial.
How to use the BMR Calculator
- 1
Choose metric or imperial and your sex.
- 2
Enter age, height and weight.
- 3
See your BMR — calories your body burns at complete rest.
- 4
Read the table for maintenance calories by activity level.
Frequently asked questions
What is BMR?
Basal Metabolic Rate is the number of calories your body burns just to stay alive at rest — breathing, circulation, cell production.
Which formula do you use?
The Mifflin-St Jeor equation, widely considered the most accurate for most people.
How do I get my daily calorie need?
Multiply BMR by an activity factor — the table does this for you across five activity levels.
Tips & discussion
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