An estimator used for daily protein intake is 0.36 grams per 1 pound of body weight (or .8g/kg). For example, if you weigh 155lbs, you should consume 56 grams per day (155 * .36 = 56 grams/day). Note: If you are overweight to begin with, do not use this estimator for your current body weight because this will calculate a higher protein intake number than you really need.