BMR Calculator
The calories you burn at complete rest, from the Mifflin-St Jeor equation — per day, per hour, and decade by decade.
Basal metabolic rate
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| Age | BMR |
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Common questions
What is BMR?
Basal (or resting) metabolic rate: the calories your body burns at rest in a day to keep you alive — breathing, circulation, temperature. It is usually the largest part of daily burn.
Which formula is used?
Mifflin-St Jeor (1990): 10 × kg + 6.25 × cm − 5 × age, + 5 for men or − 161 for women. Expect about ±10% error for one person.
Does BMR drop with age?
In the formula, by 5 kcal a day per year of age at the same weight and height — the table on this page shows it decade by decade.
How do I get daily calories from BMR?
Multiply by an activity factor (1.2 to 1.9). The TDEE calculator does this for every level.
How it's computed
BMR = 10 × kg + 6.25 × cm − 5 × age + 5 (men) or − 161 (women), rounded to 10 kcal. The age table holds weight and height fixed.
Sources
- Mifflin MD, St Jeor ST, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990;51(2):241-247. pubmed.ncbi.nlm.nih.gov
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