The BMR Calculator is a free online Basal Metabolic Rate calculator that helps you determine how many calories your body burns at rest. Your BMR represents the minimum number of calories required to keep your body functioning while you are not physically active.
Understanding your BMR is the first step toward effective weight management, diet planning, and fitness goal setting. Whether you want to lose weight, gain muscle, or maintain your current body composition, knowing your BMR helps you calculate your daily calorie needs more accurately.
This BMR Calculator is simple, fast, secure, and completely free to use. No login or registration is required.
BMR (Basal Metabolic Rate) refers to the number of calories your body burns at complete rest to maintain essential life-sustaining functions such as:
Even without physical activity, your body burns calories to perform these vital processes. That calorie requirement is your BMR.
BMR does not include calories burned through physical activity, exercise, or digestion. It only represents your resting metabolic energy requirement.
Without knowing your BMR, it becomes difficult to estimate how many calories you should consume daily.
Enter your age Select your gender Enter your height (in centimeters) Enter your weight (in kilograms) Click on “Calculate BMR”
Within seconds, the calculator will display your estimated Basal Metabolic Rate in calories per day using scientifically validated formulas.
This calculator uses the Mifflin-St Jeor Equation, one of the most accurate formulas for estimating resting metabolic rate.
For Men:
BMR = (10 × weight) + (6.25 × height) − (5 × age) + 5
For Women:
BMR = (10 × weight) + (6.25 × height) − (5 × age) − 161
These formulas are widely accepted in the health and fitness industry.
BMR = Calories burned at rest
TDEE (Total Daily Energy Expenditure) = BMR + calories burned through activity and exercise
To estimate your full daily calorie requirement, BMR is multiplied by an activity factor (sedentary, light, moderate, very active).
Age: 25 years
Gender: Male
Height: 175 cm
Weight: 70 kg
BMR = (10 × 70) + (6.25 × 175) − (5 × 25) + 5
BMR ≈ 1673 calories/day
This means your body needs approximately 1673 calories daily just to maintain essential functions at rest.
Your privacy is important. This BMR Calculator does not collect, store, or share any personal data. All calculations are performed instantly and securely in your browser.
1. Is this BMR Calculator free?
Yes, it is completely free with no hidden charges.
2. Is BMR the same as daily calorie needs?
No. BMR represents calories burned at rest. For total daily needs, calculate TDEE.
3. How accurate is the BMR calculation?
The calculator uses scientifically accepted formulas for reliable estimates.
4. Can BMR change over time?
Yes. BMR changes due to age, weight variation, muscle mass, and hormonal factors.
5. Does the tool store my personal information?
No. All calculations happen locally in your browser.
If you want to understand how many calories your body needs at rest, this BMR Calculator is the perfect tool for smart diet planning and fitness tracking.
Use this free online Basal Metabolic Rate Calculator today and take control of your health with accurate calorie insights.