What is BMR? Meaning, Formula & Examples (Basal Metabolic Rate)

BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life functions while at rest. These functions include breathing, circulation, and maintaining body temperature.

Simple Definition

Why BMR is Important

• Helps calculate daily calorie needs
• Useful for weight loss and weight gain planning
• Guides diet and fitness programs
• Helps understand metabolism

BMR Formula

The most commonly used formula is the Mifflin-St Jeor Equation:

Where:

• Weight is in kilograms (kg)
• Height is in centimeters (cm)
• Age is in years

Example

Gender: Male

Weight: 70 kg

Height: 175 cm

Age: 25 years

• BMR = (10 × 70) + (6.25 × 175) − (5 × 25) + 5
• BMR = 700 + 1093.75 − 125 + 5
• BMR ≈ 1673 calories/day

BMR vs Daily Calorie Needs

BMR is not the total calories you need daily. Your actual calorie needs depend on your activity level:

• Sedentary: Little or no exercise
• Moderate: Exercise 3–5 days/week
• Active: Daily intense exercise

Factors Affecting BMR

• Age (BMR decreases with age)
• Gender (men usually have higher BMR)
• Body composition (muscle burns more calories)
• Genetics and metabolism

Use BMR Calculator

Instead of manual calculation, use our tool for quick and accurate results:

Conclusion

BMR is a key concept in understanding how your body uses energy. Knowing your BMR helps you plan your diet, fitness, and weight goals more effectively.