Your BMR is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production. It represents the minimum energy required to keep your body functioning at rest. Check out our BMR Calculator.
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This is the estimated number of calories your body needs at rest
Our BMR Calculator estimates your Basal Metabolic Rate using the Mifflin-St Jeor and Revised Harris-Benedict formulas. In simple terms, BMR is the calories your body needs at rest for basic functions like breathing, circulation, and cell growth. To get started, enter your age, gender, height, and weight, and the calculator will give accurate results from proven equations.
Moreover, knowing your BMR helps you plan diets, fitness routines, and weight management goals. In fact, it’s the first step to setting realistic calorie targets. Overall, this easy-to-use tool is perfect for health-conscious individuals, nutritionists, and fitness enthusiasts.
Mifflin-St Jeor Equation
The Mifflin-St Jeor Equation is one of the most widely used formulas to estimate Basal Metabolic Rate (BMR) — the number of calories your body burns at rest.
Here are the formulas:
Mifflin-St Jeor Equation: Considered the most accurate for calculating BMR in most adults.
- Men: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5
- Women: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161
Example:
A 30-year-old man, weighing 70 kg and 175 cm tall:
BMR = (10×70)+(6.25×175)−(5×30)+5
BMR = 1,649 cal/day
Revised Harris-Benedict BMR formulas
Here are the Revised Harris-Benedict BMR formulas (the 1984 revision, which improved the accuracy of the original 1919 version):
Revised Harris-Benedict: An updated version of the original Harris-Benedict equation.
- Men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) – (5.677 × age in years)
- Women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) – (4.330 × age in years)
Example:
For a 30-year-old man, weighing 70 kg and 175 cm tall:
BMR = 88.362+(13.397×70)+(4.799×175)−(5.677×30)
BMR = 1,696 cal/day (approx.)
Check out our other free health and fitness calculators such as Calorie Calculator, BMI Calculator, Body Fat Calculator and Daily Steps to Ideal Weight Calculator.