Question: 140 lbs how much protein?
Answer: For a 140-pound person, that comes to 51 grams of protein each day. (You can convert your body weight from pounds to kilograms by dividing by 2.2; so, 140 pounds is 64 kg; multiplying this by 0.8 equals 51). Active people— especially those who are trying to build muscle mass— may need more.