Inputs
Basal metabolic rate estimate with multiple formulas.
Results
BMR is the estimated calories burned at rest per day.
BMR
1,648.75 kcal/day
Daily calories by activity
| Activity | Multiplier | Calories/day |
|---|---|---|
| sedentary | 1.2x | 1,978.5 kcal |
| light | 1.38x | 2,267.03 kcal |
| moderate | 1.55x | 2,555.56 kcal |
| very | 1.73x | 2,844.09 kcal |
| extra | 1.9x | 3,132.63 kcal |
Uses your selected formula and body fat input if applicable.
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How this calculator works
Calculates basal metabolic rate (BMR) using multiple common formulas. This is the calorie burn at rest and a baseline for maintenance planning before applying an activity multiplier.
Inputs
- Biological sex (male or female)
- Age in years (whole number)
- Height measured in centimeters or feet/inches
- Weight measured in kilograms or pounds
- Formula selection (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle)
- Body fat percentage for the Katch-McArdle formula
Outputs
- BMR calories per day
- Resting energy baseline
- Starting point for maintenance calculations
Assumptions
- Adult population averages
- Measurements are accurate and current
Tips
- Pair BMR with activity level for maintenance calories
- Recalculate after significant weight change
- Use as a baseline, not a precise prescription
Usage examples
Copy a scenario, then tweak inputs to match your case.
Example
Male example
Inputs
- Male, 30 years, 180 cm
- Weight 80 kg
Outputs
- BMR about 1,780 calories
- Use activity multiplier for maintenance
BMR is the resting baseline before daily activity.
Example
Female example
Inputs
- Female, 30 years, 165 cm
- Weight 60 kg
Outputs
- BMR about 1,330 calories
- Use activity multiplier for maintenance
Results are estimates and vary by body composition.
BMR by weight (male, 30y, 175cm)
| Weight | BMR estimate |
|---|---|
| 60 kg | 1,520 |
| 70 kg | 1,620 |
| 80 kg | 1,720 |
| 90 kg | 1,820 |
Each 10 kg adds about 100 calories in this profile.
BMR vs weight
60
1,520
70
1,620
80
1,720
90
1,820
Profile assumes male, 30 years, 175 cm height.
References
- Mifflin-St Jeor equation
- Clinical nutrition energy estimation basics
FAQ
Common questions
What does the BMR Calculator do?
Calculates basal metabolic rate (BMR) using multiple common formulas. This is the calorie burn at rest and a baseline for maintenance planning before applying an activity multiplier. It is part of our fitness & health toolkit.
What inputs do I need?
Typical inputs include Biological sex (male or female), Age in years (whole number), Height measured in centimeters or feet/inches.
How are the results calculated?
We follow the formulas and assumptions outlined in the "How this calculator works" section. You will see outputs like BMR calories per day, Resting energy baseline, Starting point for maintenance calculations.
Can I share or download the results?
Use the Copy link or Print buttons to share your results. If a table or chart appears, you can download the data as CSV.
Is my data stored?
No. Calculations run in your browser and we do not store your inputs.
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