Our free calorie calculators use the Harris-Benedict, Mifflin-St Jeor and Katch-McArdle equations, taking into account your weight, height, age, and activity level.
Download our FREE workout and nutrition tracking mobile app - Synrgetic. It includes a built-in calorie calculator that gives results you can use when tracking your nutrition in the app. Available on iOS and Android.
This equation calculates a person's basal metabolic rate (BMR), which is the number of calories needed to sustain basic bodily functions at rest.
This equation is similar to the Harris-Benedict equation, but it's considered to be more accurate.
This equation calculates a person's resting energy expenditure (REE) using lean body mass (LBM) instead of weight. It's considered to be more accurate for people with a high muscle mass.