How Much Protein Do I Need?
For healthy adults, an estimator used for daily protein intake is 0.36 grams per 1 pound of body weight. Formula = 0.36 grams/pound of body weight. For example, if you weigh 155 lbs, you should consume 56 grams of protein per day (155lbs x .36g/lbs = 56g).
Institute of Medicine, 2002