BMR calculator

Your Basal Metabolic Rate (BMR) is the number of calories your body needs to perform essential functions like breathing, maintaining body temperature, and keeping your organs functioning while at rest. It’s a crucial factor to consider when determining your daily calorie needs for weight management and overall health. BMR varies based on your age, gender, weight, and height. Below, we’ll provide you with a BMR calculator for both metric and US customary units.

US Units
Metric Units

Result:

BMR Calculation in Metric Units (SI):

The most common formula for calculating BMR in metric units is the Mifflin-St Jeor Equation:

For Men:BMR = 10 * weight (kg) + 6.25 * height (cm) – 5 * age (years) + 5

For Women:BMR = 10 * weight (kg) + 6.25 * height (cm) – 5 * age (years) – 161

Weight in Kilograms (kg): Your body weight should be in kilograms.

Height in Centimeters (cm): Your height should be in centimeters.

Age in Years: Your age should be in years.

BMR Calculation in US Customary Units:

For those using US customary units (pounds and inches), the formula is slightly different:

For Men:BMR = 66 + (6.23 * weight (lbs)) + (12.7 * height (inches)) – (6.8 * age (years))

For Women:BMR = 655 + (4.35 * weight (lbs)) + (4.7 * height (inches)) – (4.7 * age (years))

Weight in Pounds (lbs): Your body weight should be in pounds.

Height in Inches: Your height should be in inches.

Age in Years: Your age should be in years.

How to Use the BMR Calculator:

Select the Appropriate Formula: Choose the formula based on your gender and preferred unit system (metric or US customary).

Enter Your Information: Input your weight, height, and age as per the selected formula and unit system.

Calculate Your BMR: The BMR calculator will provide you with your Basal Metabolic Rate.

What Does Your BMR Tell You?

Your BMR represents the minimum number of calories your body requires to maintain basic bodily functions while at rest. To determine your daily calorie needs, you can use your BMR as a starting point and factor in your activity level. The Harris-Benedict Equation is commonly used for this purpose:

Total Daily Calorie Needs = BMR x Activity Level

By multiplying your BMR by an activity factor that corresponds to your daily activity level (sedentary, lightly active, moderately active, very active), you can estimate the number of calories you need to maintain, gain, or lose weight.

Remember that these calculations provide estimates, and individual variations exist. For personalized nutrition and fitness guidance, consult with a registered dietitian or healthcare professional.