BMR Calculator
Find your Basal Metabolic Rate — the calories your body burns at rest — in seconds, from age, sex, weight and height.
Your details
Your resting burn
Uses the Mifflin-St Jeor equation. To see full activity-adjusted calories, try the TDEE calculator.
Frequently asked questions
What is BMR?
BMR stands for Basal Metabolic Rate — the number of calories your body burns at complete rest to keep you alive. It does not include physical activity.
What is the Mifflin-St Jeor equation?
It is one of the most accurate common BMR formulas. For men: 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5. For women: the same, but −161 instead of +5.
How is BMR different from TDEE?
BMR is your calorie burn at rest. Total Daily Energy Expenditure (TDEE) multiplies BMR by your activity level, so it is the number you plan meals around.
Why does my BMR decrease as I age?
Muscle mass and metabolic rate typically decline with age, so the equation gives a slightly lower BMR each year. Resistance training can help offset some of this.
Is BMR the same as losing weight calories?
No. For weight loss you target a deficit below your TDEE, not your BMR. Eating at or below BMR is generally too low for most people.