Basal Metabolic Rate
Basal Metabolic Rate (BMR) is the mimimal caloric requirement needed to sustain life in a resting individual. This is the amount of energy your body would burn if you slept all day (24 hours).

This calculator uses the Harris-Benedict Equation to estimate your BMR.
Instructions
Select either Metric or Imperial units and your gender.  Input your Height, Weight, and Age.

Click the Calculate button and your Basal Metabolic Rate (BMR) will be displayed below.
 
Height cm Weight kg Age years Basal Metabolic Rate
Units Gender