I dont feel hungry or weak, even if I eat something like 1500 Kcal a day. I am 176cm and weigh 77kg. All the calculators in the Internet tell me to eat more, but since I feel great and satiated whats the point? Maybe my metabolism is slow or something?

And if your wondering, my weight mainly consists of musle and im not that fat.

1500kcal a day is too low. I am the same height as you and weigh 72kg and I eat 2000kcal per day. I'd say at least 1800kcal and see where you go from there. You see, when you're trying to lose weight, you're trying to lose the fat. If you eat too little, you will lose weight but it will be muscle as well as fat. If you eat right, you can build muscle whilst losing fat. BMR etc are very rough estimates. Get a measuring tape and try ww.mybodycomp.com it'll help you out. Say you exercise 6 times a week,3-4 days weights, 2-3 days cardio HIIT or LISS. Shawn Phillips, a muscle-toned 5'9" man (that's 176cm) with 6% bodyfat weighing 200lbs (91kg) says he eats around 2600 calories maintenance and drops 300-500kcal when he wants to lose some weight, no more. Now, my BMRx1.55 is around 3000kcal. Sounds a bit off to me. I have less muscle and more bodyfat than this guy and my maintenance is higher than his? Putting my things into my body comp, my maintenance is 2400kcal. Sounds about right, with my desk job and all. If you are a construction worker, you will need significantly more calories than me!

P.S. I had tried 1600kcal and I wasn't tired either. However, I hit a plateau relatively quick. Muscle needs MORE calories than fat to sustain itself.

I dont feel hungry or weak, even if I eat something like 1500 Kcal a day. I am 176cm and weigh 77kg. All the calculators in the Internet tell me to eat more, but since I feel great and satiated whats the point? Maybe my metabolism is slow or something?

And if your wondering, my weight mainly consists of musle and im not that fat.

What's your point? Are you asking for advise? I get the feeling you've got your mind made up either way.