tracking heaving lifting

I've been doing a bit of research on heavy lifting and am starting a program next month when I'm back from holiday. I am currently tracking every day, and using a HRM when I'm doing my exercises (doing HIIT at the moment). I'm looking at starting the stronglifts 5x5 program, have been reading and watching a lot about it this week and it seems fairly straight forward and a decent place for me to start. Now when I'm tracking this type of exercise I'm assuming it'd be in the strength category since it's squats, deadlifts, presses, etc. I have tracked that in the past and it doesn't give a calorie burn for it, but from experience I know that you still get a good burn. Reading the forums I have seen people say that a HRM is only good for steady state cardio, which I'm assuming heavy lifting isn't, so it wouldn't be useful wearing it when lifting...or am I wrong thinking that? Also, since I know I'm burning calories when lifing how would I track this so I know what my calorie goal should be for the days that I'd be lifting?