How accurate is this BMR?

Our calculator uses scientifically validated formulas and provides results based on peer-reviewed research. Results should be used as a general guide and not as medical advice.

Is this tool free to use?

Yes, this BMR is completely free to use. No registration or payment required.

Can I use this calculator on mobile?

Yes, our calculator is fully responsive and works on all devices including smartphones, tablets, and desktop computers.

BMR

Calorie & Metabolism

BMR helps you Estimate daily energy needs, metabolism, and calorie targets for health or weight goals.

BMR Calculator

Calculate your Basal Metabolic Rate - the calories you burn at rest

Age

years

Gender

Height

Weight

Formula

Mifflin-St Jeor Most accurate for most people Recommended

Harris-Benedict Original formula from 1918

Katch-McArdle Best for athletes (needs body fat %)

Body Fat Percentage

Required for Katch-McArdle formula

Your Basal Metabolic Rate

calories/day

This is the number of calories your body burns at rest to maintain vital functions like breathing, circulation, and cell production.

Daily Calorie Needs by Activity Level

Sedentary Little or no exercise -- cal

Light 1-3 days/week -- cal

Moderate 3-5 days/week -- cal

Active 6-7 days/week -- cal

Very Active Hard + physical job -- cal

Understanding Your BMR

BMR accounts for 60-75% of your total daily energy expenditure
Muscle burns more calories than fat, even at rest
BMR naturally decreases with age (about 2% per decade after 20)
Never eat below your BMR - this can slow your metabolism

BMR calculations are estimates. Individual metabolism varies based on genetics, hormones, body composition, and other factors. Consult a healthcare professional for personalized advice.

About the BMR

This tool turns common health inputs into a clear, educational result you can use to understand your current patterns and prepare better questions for a qualified healthcare professional.

Results are informational and are not a diagnosis, prescription, or substitute for medical care.

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BMR

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BMR Calculator

Daily Calorie Needs by Activity Level

Understanding Your BMR

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About the BMR