Calorie Maintenance Calculator
The calculator above will figure out your Basal Metabolic Rate (BMR) using the Harris-Benedict Equation, which is a widely accepted equation used for calculating this number. Your BMR is the number of calories that your body burns at rest to do all of the things it needs to do to keep you alive and functioning properly.
Your activity level is also factored in to estimate how many other calories you burn per day in addition to your BMR. The answer given is the total of the two and should be, for most people, a pretty close estimate of your daily calorie maintenance level.