Question: how many calories does it take to gain a pound of weight?
Answer: Calories Needed to Gain 1 Pound It takes an added 3,500 calories to gain a pound. To gain weight at a safe rate of around 0.5 to 1 pound each week, you'll need to eat an extra 1,750 to 3,500 calories weekly, which corresponds to an extra 250 to 500 calories a day.