500 kcal daily for a month a person can gain how much weight?

Consuming an excess of 500 kcal daily can lead to a weight gain of approximately 1 pound (0.45 kg) per week, as 3,500 kcal is generally estimated to equal 1 pound of body weight. Over a month (about 4 weeks), this could result in a total weight gain of around 4 pounds (1.8 kg). However, individual factors like metabolism, activity level, and body composition can influence actual weight gain.