Use this tool to figure out how many calories you're burning during various activities. Just fill in your weight, choose an activity and enter the duration.
Trying to gain muscle? Lose Fat? Maintain current weight? What are your protein needs? Use this Protein Calculator to find out what your body needs and help reach your goals faster.
So what are the "simple mathematics of fat loss"? A pound of fat equals 3500 calories - so to lose a pound of fat in a week you have to ingest 500 calories less per day than you normally do OR eat 250 calories less and burn 250 calories more than you usually do. It's that simple!