Calculate your Basal Metabolic Rate: the calories your body burns at complete rest: using the most accurate formulas available. Includes a full TDEE table across five activity levels.
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Fill in the form and tap Calculate My BMR to see your resting calorie needs.
| Activity | Description | Daily Calories |
|---|
BMR (Basal Metabolic Rate) is the minimum calories your body needs just to exist: breathing, heartbeat, cell repair, temperature regulation. It assumes you are lying completely still for 24 hours.
TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor. It is the number of calories you actually burn each day: and the number to target when setting calorie goals.
| Formula | Published | Accuracy | Best For |
|---|---|---|---|
| Mifflin-St Jeor | 1990 | Within ±10% for most adults | General adult population: recommended by AND |
| Harris-Benedict (revised) | 1984 | Within ±15% | Historical reference; slightly less accurate |
The Mifflin-St Jeor equation is endorsed by the Academy of Nutrition and Dietetics as the most accurate predictor of resting metabolic rate for adults without known body composition data.