🔥 BMR Calculator
Estimate your basal metabolic rate with proven formulas and see daily needs by activity level
Calculate Your BMR
Mifflin St Jeor, Revised Harris-Benedict, and Katch-McArdle (needs body fat %).
Used only for Katch-McArdle.
Your BMR
Basal Metabolic Rate
1705 kcal
Daily calorie needs based on activity level
Sedentary (little or no exercise)
× 1.2
2046 kcal
Light (1-3 days/week)
× 1.375
2344 kcal
Moderate (3-5 days/week)
× 1.55
2643 kcal
Active (6-7 days/week)
× 1.725
2941 kcal
Very Active (hard exercise daily)
× 1.9
3240 kcal
Extra Active (very hard exercise/physical job)
× 2
3410 kcal
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Formulas & Variables
Details for Mifflin St Jeor, Revised Harris-Benedict, and Katch-McArdle.
Mifflin St Jeor
For men: BMR = 10W + 6.25H - 5A + 5 For women: BMR = 10W + 6.25H - 5A - 161
Revised Harris-Benedict
For men: BMR = 13.397W + 4.799H - 5.677A + 88.362 For women: BMR = 9.247W + 3.098H - 4.330A + 447.593
Katch-McArdle
BMR = 370 + 21.6 (1 - F) W
Variables
- W: body weight in kg
- H: body height in cm
- A: age in years
- F: body fat as a fraction (e.g., 20% → 0.20)
These match the equations used in our calculations and are commonly referenced for BMR estimation.
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