BMR Calculator (Basal Metabolic Rate)
Calculate the base number of calories burned by your body at rest
Yrs
kg
cm
Calculation Result
Basal Metabolic Rate (BMR)
1,649 kcal/day
Mifflin-St Jeor formula baseline resting caloriesMifflin-St Jeor
1,649 kcal
Harris-Benedict
1,696 kcal
Average BMR
1,673 kcal
How this calculator works
1
Enter age, gender, height, and weight.
2
Get your baseline resting energy burn in calories/day.
3
Use this baseline to calculate total daily energy expenditure (TDEE).
Formula & Mathematics
Mifflin-St Jeor BMR Equation
Men: 10W + 6.25H - 5A + 5; Women: 10W + 6.25H - 5A - 161
Where W is weight in kg, H is height in cm, and A is age in years. Considered the clinical gold standard.
Worked Example
30-year-old male, 75 kg, 180 cm
BMR = 10(75) + 6.25(180) - 5(30) + 5.
• 750 + 1125 - 150 + 5 = 1,730 kcal/day
Your body expends approximately 1,730 calories daily just maintaining vital organs at rest.
Frequently Asked Questions
Eating significantly below your BMR for extended periods is generally discouraged as it can slow metabolism and cause muscle loss.
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