BMR Calculator
Calculate your Basal Metabolic Rate and daily calorie needs. Free, fast and private.
Formula (Mifflin-St Jeor): Men: BMR = 10 × weight + 6.25 × height − 5 × age + 5. Women: BMR = 10 × weight + 6.25 × height − 5 × age − 161. BMR is the calories your body burns at complete rest. Results are indicative — consult a health professional for personal advice.
How to use BMR Calculator
- Choose your gender, then enter your age, weight in kg and height in cm.
- Click Calculate BMR.
- Read your basal metabolic rate — the calories you burn at complete rest — plus the formula breakdown.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
What is BMR?
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest just to keep you alive — breathing, circulation and cell repair.
What formula does this calculator use?
The Mifflin-St Jeor equation, the most widely used BMR formula: 10 × weight (kg) + 6.25 × height (cm) − 5 × age, plus 5 for men or minus 161 for women.
Is BMR the same as daily calorie needs?
No. BMR is calories at rest only. Your total daily need (TDEE) is BMR multiplied by an activity factor — see the Calorie Calculator.
Is this BMR calculator free?
Yes, it is 100% free with no sign-up. Your data stays in your browser.