Whether your goal is weight loss, muscle gain, or maintenance, everything starts with one number: how many calories your body actually needs. Our free calorie and BMR calculator give you that number instantly, based on real science — not guesswork.
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, cell production. Knowing your basal metabolic rate calculator result is the foundation of any fitness or weight-management plan.
BMR vs TDEE — What’s the Difference?
Your BMR is calories burned at rest. Your TDEE calculator (Total Daily Energy Expenditure) adds your activity level on top of that — giving you the real number of calories you burn in a full day. This is the number you actually use for planning your diet.
How to Use Your Results
- Weight loss calorie calculator: eat below your TDEE (calorie deficit)
- Maintenance calories calculator: eat at your TDEE
- Muscle gain: eat above your TDEE with adequate protein
How the Calculator Works
Enter your age, gender, height, weight, and activity level. The tool uses the Mifflin-St Jeor equation — the most accurate and widely used metabolism calculator formula recommended by nutrition professionals — to calculate your BMR and daily calorie intake calculator results.
Frequently Asked Questions
How many calories should I eat to lose weight?
A general rule is a 500 calorie daily deficit from your TDEE for roughly 0.5kg/1lb of weight loss per week.
Is BMR the same as the calories I should eat?
No — BMR is your resting burn rate only. Your total daily calorie intake calculator result should be based on TDEE, which includes activity.
Is this calorie calculator accurate?
It uses the Mifflin-St Jeor equation, considered the gold standard among calorie and BMR calculators for general population accuracy.