BMR Calculator

Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation

Formula

Male: BMR = 10W + 6.25H - 5A + 5; Female: BMR = 10W + 6.25H - 5A - 161

W = weight in kg, H = height in cm, A = age in years. This is the Mifflin-St Jeor equation, validated as most accurate for general population.

How to Calculate Manually

1
Select your sex (male/female)
2
Enter your age in years
3
Enter your height in centimeters
4
Enter your weight in kilograms
5
Apply Mifflin-St Jeor formula based on sex
6
Result is calories burned at complete rest per day

Reference Table

Activity Level	Multiplier	Description
Sedentary (little/no exercise)	1.2	Desk job, no exercise
Lightly Active (1-3 days/week)	1.375	Light exercise 1-3 days
Moderately Active (3-5 days/week)	1.55	Moderate exercise 3-5 days
Very Active (6-7 days/week)	1.725	Hard exercise daily
Extra Active (2x/day, physical job)	1.9	Athlete or heavy physical labor

BMR Calculator: Understanding Your Basal Metabolic Rate

Your Basal Metabolic Rate (BMR) is the foundation of understanding your calorie needs. It represents the energy your body requires just to keep you alive at rest...

Frequently Asked Questions

What is BMR? Basal Metabolic Rate is the number of calories your body burns at complete rest to maintain vital functions (breathing, circulation, cell production). It's about 60-70% of total daily energy expenditure.: Basal Metabolic Rate is the number of calories your body burns at complete rest to maintain vital functions (breathing, circulation, cell production). It's about 60-70% of total daily energy expenditure.
Which formula is most accurate? Mifflin-St Jeor (used here) is considered the most accurate for most people. Harris-Benedict is older but still used. Katch-McArdle is best if you know your body fat percentage.: Mifflin-St Jeor (used here) is considered the most accurate for most people. Harris-Benedict is older but still used. Katch-McArdle is best if you know your body fat percentage.
How do I use BMR for weight loss? Multiply BMR by activity factor for TDEE, then subtract 500 calories for ~1 lb/week loss. Never eat below BMR without medical supervision.: Multiply BMR by activity factor for TDEE, then subtract 500 calories for ~1 lb/week loss. Never eat below BMR without medical supervision.

Calculator

Formula

Formula

How to Calculate Manually

Reference Table

BMR Calculator: Understanding Your Basal Metabolic Rate

Frequently Asked Questions

Related Calculators

BMI Calculator

Body Fat Percentage Calculator

Calorie Deficit Calculator

Daily Water Intake Calculator

More Health Calculators

Absolute Neutrophil Count (ANC) Calculator

Anion Gap Calculator

Apgar Score Calculator

BMI Calculator

Body Fat Percentage Calculator

Body Surface Area Calculator