BMR Calculator
Estimate your basal metabolic rate (BMR) - the number of calories your body burns each day just to stay alive at rest.
Estimated BMR
1,737 cal/day
This is the estimated number of calories your body burns at complete rest.
What Your Result Means
Your BMR is the energy your body needs for basic functions like breathing, circulation, and cell production while completely at rest. It does not include calories burned through daily activity or exercise - see the TDEE Calculator to add activity level on top of your BMR.
How It Is Calculated
Calqora uses the Mifflin-St Jeor equation, the formula most widely recommended in modern clinical nutrition:
Men: BMR = 10W + 6.25H - 5A + 5
Women: BMR = 10W + 6.25H - 5A - 161
Where W is weight in kg, H is height in cm, and A is age in years.
Worked Example
A 30-year-old male who is 5'10" (178 cm) and weighs 170 lbs (77 kg) has an estimated BMR of about 1,712 calories per day.
Important Assumptions
- The Mifflin-St Jeor equation uses biological sex as a formula input, not gender identity.
- Provides a population-level estimate - individual metabolism varies due to genetics, muscle mass, and health conditions.
Frequently Asked Questions
- Why does the formula ask for sex?
- The Mifflin-St Jeor equation includes a sex-based adjustment because average body composition differs between men and women, which affects resting energy needs.
- Is this the same as TDEE?
- No - BMR is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) adds your activity level on top of BMR for a full daily estimate. See our TDEE Calculator.
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Methodology
This calculator uses the Mifflin-St Jeor equation, widely regarded as more accurate than older formulas like Harris-Benedict. See our methodology page for details.
This calculator provides estimates for educational purposes only. It does not provide medical diagnosis and is not a substitute for professional medical advice. Consult a qualified healthcare provider about your health.