Estimate basal metabolic rate — calories burned at complete rest.
Estimate basal metabolic rate — calories burned at complete rest.
Enter values above and click Calculate — results will appear here with the formula explained.
Basal metabolic rate is your body's idle power draw: energy spent keeping the heart beating, lungs breathing and brain running before any movement. It typically accounts for 60–75% of total daily expenditure.
The Mifflin-St Jeor equation is the current standard estimate, outperforming the older Harris-Benedict formulas against measured values. Still, individual metabolism varies around any prediction — real-world measurement (indirect calorimetry) can deviate by 10% or more either way.
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Basal metabolic rate is your body's idle power draw: energy spent keeping the heart beating, lungs breathing and brain running before any movement. It typically accounts for 60–75% of total daily expenditure. Formula: Mifflin-St Jeor: BMR = 10·kg + 6.25·cm − 5·age + (male: +5 | female: −161)
BMR Calculator: Estimate basal metabolic rate — calories burned at complete rest. Formula: Mifflin-St Jeor: BMR = 10·kg + 6. Example: A 32-year-old male at 75 kg and 178 cm: 750 + 1112.
Estimate basal metabolic rate — calories burned at complete rest. Formula: Mifflin-St Jeor: BMR = 10·kg + 6.25·cm − 5·age + (male: +5 | female: −161)
| Field | What to enter |
|---|---|
| Sex | Enter a value |
| Age (years) | e.g. 32 |
| Weight (kg) | e.g. 75 |
| Height (cm) | e.g. 178 |
All fields use the exact formulas shown below — results include step-by-step breakdowns you can verify by hand.
Basal metabolic rate is your body's idle power draw: energy spent keeping the heart beating, lungs breathing and brain running before any movement. It typically accounts for 60–75% of total daily expenditure.
The Mifflin-St Jeor equation is the current standard estimate, outperforming the older Harris-Benedict formulas against measured values. Still, individual metabolism varies around any prediction — real-world measurement (indirect calorimetry) can deviate by 10% or more either way.
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A 32-year-old male at 75 kg and 178 cm: 750 + 1112.5 − 160 + 5 ≈ 1,708 kcal burned per day at complete rest.
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