I have recently started going to the gym to gain some muscle weight. I am 5’5 and 114 lbs. I have no idea how many calories I should be eating a day. I have a small appetite and I’ve been eating about 1 300 calories a day, and I know that’s not enough, especially when going to the gym. I was wondering, how exactly I’m supposed to calculate this? Now, I’m a beginner and I’m still very weak, so I do only 4 exercises. 2 for legs and 2 for arms. I also walk a lot, approximately 15 000 steps a day. I only want to gain muscle weight. Is there a website I could use to count how much I need? (Also I know protein is good, I already eat about 70 g of protein a day)