BMR Calculator
Calculate your daily Basal Metabolic Rate (BMR) with our free BMR Calculator online. Using the scientifically recognized Mifflin-St Jeor formula calculator equation, calculate how many resting calories your body burns in 24 hours based on age, gender (men and women), height in cm or inches, and weight in kg or lbs.
BMR Calculator
BMR Calculator
Calculation Results Summary
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Calculation Results Summary
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Mifflin-St Jeor Equation Standard
BMR Calculator Online – Basal Metabolic Rate Calculator for Men & Women
Calculate your daily Basal Metabolic Rate (BMR) with our free BMR Calculator online. Using the scientifically recognized Mifflin-St Jeor formula calculator equation, calculate how many resting calories your body burns in 24 hours based on age, gender (men and women), height in cm or inches, and weight in kg or lbs.
Mifflin-St Jeor BMR Calculator Formula Equations
Men: BMR = 10W + 6.25H - 5A + 5 | Women: BMR = 10W + 6.25H - 5A - 161BMR for Men: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in yrs) + 5 | BMR for Women: (10 × weight in kg) + (6.25 × height in cm) - (5 × age in yrs) - 161
BMR Formula Comparison Matrix (Mifflin-St Jeor vs. Harris-Benedict & Katch-McArdle)
Commonly cited equation for adult BMR estimation
Tends to yield slightly different estimates in modern adults
Calculates BMR using lean body mass (LBM)
| Category / Level | Reference Range / Metric | Reference Context |
|---|---|---|
| Mifflin-St Jeor Formula | Predictive Equation (1990) | Commonly cited equation for adult BMR estimation |
| Revised Harris-Benedict (1984) | Classic Historical Reference | Tends to yield slightly different estimates in modern adults |
| Katch-McArdle Formula | Katch-McArdle LBM Formula | Calculates BMR using lean body mass (LBM) |
Frequently Asked Questions
What is a BMR calculator and how to calculate basal metabolic rate?
A BMR calculator (Basal Metabolic Rate Calculator) estimates the baseline calories your body expends at rest over 24 hours to support vital organ functions.
What is the Mifflin-St Jeor BMR formula for men and women?
The Mifflin-St Jeor equation calculates BMR as follows: For Men: BMR = (10 × kg) + (6.25 × cm) - (5 × age) + 5. For Women: BMR = (10 × kg) + (6.25 × cm) - (5 × age) - 161.
How does age affect your BMR calculation?
BMR gradually decreases over time as body composition changes with age.
How to calculate BMR in kg and cm online?
Enter your weight in kilograms (kg) and height in centimeters (cm) alongside age and sex into our online BMR calculator to get your instant calorie burn estimate.
What is the difference between BMR and TDEE?
BMR is your resting metabolic burn at 0% activity. TDEE (Total Daily Energy Expenditure) multiplies BMR by your physical activity level factor to account for movement and exercise.
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