BMR Calculator
Basal metabolic rate (BMR) is the energy your body uses in a day just to stay alive: breathing, circulating blood, keeping warm. It accounts for 60% to 70% of the calories most people burn.
Type a number and the answer appears straight away.
Basal metabolic rate1,676 kcal/day
Mifflin-St Jeor equation.
| Activity level | Calories per day |
|---|---|
| Sedentary (little or no exercise) | 2,011 |
| Light (exercise 1-3 days a week) | 2,305 |
| Moderate (exercise 3-5 days a week) | 2,598 |
| Active (exercise 6-7 days a week) | 2,891 |
| Very active (hard daily exercise or physical job) | 3,185 |
The math behind it: BMR
Men: 10 x kg + 6.25 x cm - 5 x age + 5 Women: 10 x kg + 6.25 x cm - 5 x age - 161
This is the Mifflin-St Jeor equation, published in 1990 and generally regarded as the most accurate of the simple formulas. The table multiplies your BMR by standard activity factors to estimate total daily calories.
Common questions
What affects BMR?
Body size and muscle mass raise it. It falls gradually with age, mainly because of muscle loss, and is lower on average in women than in men of the same weight.
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