Free BMR Calculator
Estimate basal metabolic rate and daily calories.
Calculate basal metabolic rate (BMR) and total daily energy expenditure (TDEE) with the Mifflin-St Jeor formula. Supports metric and imperial units plus activity levels.
How to use BMR Calculator
- Choose sex, age, weight, and height.
- Pick your activity level.
- See BMR and estimated daily calories.
Features
- Mifflin-St Jeor
- Metric and imperial
- TDEE by activity
Why use this tool
- Estimate basal metabolic rate from age, sex, height, and weight.
- Use BMR as a starting point for daily calorie planning.
- Get a quick number without a fitness-app signup.
Common use cases
- Set a rough calorie baseline before tracking diet
- Compare Mifflin-St Jeor style estimates for personal planning
- Discuss activity multipliers with a coach using a shared BMR
What is BMR Calculator?
BMR Calculator is a free online tool on Free Quick Tools. Estimate basal metabolic rate and daily calories. Processing stays in your browser whenever this tool runs locally.
Privacy
Your files never leave your device. All processing happens in your browser.
Frequently Asked Questions
Is BMR the same as TDEE?
No. BMR is energy at rest. Total daily energy expenditure also includes activity and exercise.
How accurate is it?
Formulas are population estimates. Muscle mass, health conditions, and measurement error can shift real needs — consult a professional for medical advice.
Is my data private?
Yes. Inputs are calculated in your browser and are not stored for processing.
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