BMR Calculator
Calculate Basal Metabolic Rate (BMR) online instantly. Estimate daily calorie needs based on age, gender, height and weight.
Last updated: 2026-05-20
Free Online BMR Calculator
Use this free online bmr calculator tool directly in your browser without installing software. Fast, mobile friendly and easy to use.
BMR Calculator
Activity Levels
| Activity Level | Description |
|---|---|
| Sedentary | Little or no exercise |
| Lightly Active | Exercise 1-3 days/week |
| Moderately Active | Exercise 3-5 days/week |
| Very Active | Exercise 6-7 days/week |
About BMR
BMR estimates the calories your body needs to maintain essential functions while at rest. Actual calorie needs may vary depending on lifestyle and health conditions.
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About This Tool
About BMR Calculator
This free online BMR Calculator helps you estimate your Basal Metabolic Rate (BMR) based on age, gender, height and weight.
BMR represents the number of calories your body needs each day to maintain basic life-supporting functions at rest.
What This Tool Calculates
- Basal Metabolic Rate (BMR)
- Estimated daily calorie needs
- Maintenance calorie estimate
- Activity-based calorie calculation
- Metabolism estimation
Frequently Asked Questions
What is BMR?
BMR (Basal Metabolic Rate) is the number of calories your body burns while at complete rest.
How is BMR calculated?
This tool uses the Mifflin-St Jeor Equation based on gender, age, height and weight.
What affects BMR?
Age, gender, height, weight and muscle mass can affect BMR values.
Is this BMR Calculator free?
Yes. This tool is completely free to use online.
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