How many calories am I likely burning?

I’m male, 25, 64kg and 169cm, and I wake up at 5:45 every morning to exercise for at least 45 minutes. I do a PPL split so I either do chest shoulder and tri workouts or back and biceps, and the other two leg days I run 5 kilos. I also live in a big city so I walk at least 5 thousand steps a day to get to and from school. This all makes me think I’d have a “heavy exercise” lifestyle in apps like Cronometer, but other than those 45 minutes of exercise and walking to and from school I’m sitting down almost the whole day due to school and studying. In Cronometer should I set my lifestyle to sedentary, or heavy exercise? I’m a bit confused on this so any help would be appreciated!!