The recommended dietary allowance for proteins is based on body weight. For a healthy adult, the recommended dietary allowance is 0.8g/kg, which is approximately 10% of the recommended total calories.
Thus, for a person who has 60 kg on average, they need 60 x 0.8g = 48g protein.
Most of the time we actually over eat proteins which is not good for your health. Check out our post on why you should avoid eating excess proteins!