How do you calculate the RDA for protein?

.8 multiplied by your weight (in kilograms)

Example: 176 lbs. (80 kilograms) x .8g = 64 grams

The following below is according to Author Susan Kleiner,Ph.D, RD with Maggie Greenwood-Robinson author of "POWER EATING. Copyright 2007 (Page 207)

Calculate Your Protein Needs

Protein needs change with both energy intake and training goals. You can easily convert your weight from pounds to kilograms by dividing your weight by 2.2. Make sure to cover your protein needs during all four diet strategies. If you are a vegan, add 10 percent more protein to all of the plans.

Maintenance: 1.4 grams per kilogram of body weight a day.

Building: 2 grams per kilogram of body weight a day.

Losing fat: 2.2 grams per kilogram of body weight a day.

Cutting: 2.3 grams per kilograms of body weight a day (2.2 for those eating mostly vegetarians).