Calculate your Basal Metabolic Rate with precision and get personalized nutrition recommendations
Fill in your details and click 'Calculate BMR' to see your personalized results
Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic functions like breathing, cell production, and heart function while at rest. It represents the minimum amount of energy needed to keep your body functioning.
For most accurate BMR assessment, consult with healthcare professionals who can perform direct measurements.
Once you know your BMR, you can use it in conjunction with other tools like the Daily Calorie Needs Calculator to estimate your total daily energy expenditure (TDEE) and the Macro Distribution Calculator to plan your macronutrient intake for optimal health and fitness goals.
This calculator uses three different formulas to estimate your BMR:
Considered the most accurate for most people. Takes into account weight, height, age, and sex.
The original BMR formula, revised in 1984. Still widely used in nutritional settings.
Incorporates body fat percentage for potentially more accurate results if you know your body composition.
The Basal Metabolic Rate (BMR) is calculated using mathematical formulas that take into account various factors such as age, weight, height, sex, and sometimes body fat percentage. These formulas provide an estimate of the calories your body needs to maintain basic physiological functions while at rest.
There are several formulas used to calculate BMR, each with its own strengths and applications. Below are the most widely used BMR formulas:
This formula is considered the most accurate for most people and is widely used in modern nutrition. It takes into account weight, height, age, and sex.
One of the earliest BMR formulas, revised in 1984. While less accurate than Mifflin-St Jeor, it is still commonly used.
This formula is unique because it incorporates body fat percentage, making it ideal for individuals who know their body composition. It is gender-neutral.
The choice of formula depends on the information available and the accuracy required:
Calculating your BMR is essential for understanding how many calories your body needs daily. Once you know your BMR, you can combine it with your activity level to estimate your Total Daily Energy Expenditure (TDEE). This helps you create a calorie deficit for weight loss or a surplus for weight gain, depending on your goals.