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BMR Calculator - Basal Metabolic Rate Calculator (Man/Woman)

Calculate Your Daily Calorie Needs at Rest

This tool calculates your Basal Metabolic Rate (BMR), the calories your body needs to maintain basic physiological functions while at rest. Knowing your BMR is the starting point for nutrition and fitness plans.

BMR Calculator

Calculate Your Basal Metabolic Rate

Calculate TDEE Next →

Go to TDEE

Key points

Key Points About BMR

  1. 01BMR represents the minimum energy required for vital functions like breathing, circulation, and cellular production.
  2. 02The Mifflin-St Jeor equation is considered more accurate than the older Harris-Benedict formula for most people.
  3. 03BMR typically accounts for 60-75% of total daily energy expenditure in sedentary individuals.
  4. 04Factors affecting BMR include age, gender, weight, height, muscle mass, and genetics.
  5. 05BMR naturally decreases with age due to loss of muscle mass and metabolic changes.
BMR Basal Metabolic Rate Calculator Illustration

How to use

How to Use the BMR Calculator

  1. 01Select your gender (male or female)
  2. 02Enter your age in years
  3. 03Enter your height in centimeters
  4. 04Enter your weight in kilograms or pounds
  5. 05Click "Calculate BMR" to get your results
  6. 06Review the results from different formulas for comparison

Frequently Asked Questions

01

What is BMR and why is it important?

BMR (Basal Metabolic Rate) is the number of calories your body needs to maintain basic functions at rest. It's important because it represents the minimum energy requirement and forms the foundation for calculating total daily energy expenditure.

02

Which BMR formula is more accurate?

The Mifflin-St Jeor equation is generally considered more accurate for most people as it was developed using more recent data. However, both formulas provide good estimates for healthy adults.

03

How does BMR differ from TDEE?

BMR is your calorie needs at complete rest, while TDEE (Total Daily Energy Expenditure) includes all activities and exercise. TDEE = BMR × Activity Level Factor.

04

Can I use BMR for weight loss planning?

BMR provides a baseline, but you should use TDEE for weight management. Never eat below your BMR for extended periods as it can slow metabolism and cause health issues.

05

How often should I recalculate my BMR?

Recalculate your BMR when your weight changes noticeably (5+ kg), or every 3-6 months to account for age-related changes.