Strength training and calories burned

there is NO way to provide a general caloric burn associated with resistance training... a person could do 3 sets of 20 reps with a 5 lb dumbbell.. is that going to be the same as someone doing 5 sets of 15 reps with 30 lb dumbbells? how about if someone does 3 sets of 20 with 5 lb in 2 minutes... v 3 sets of 20 in 15 minutes... there are too many variables to account for a calorie burn with lifting... just drop those calories into a black hole and consider them bonuses towards your ultimate goal...

If you are curious how much you burn, get a heart rate monitor and enter in the calories you lost that way.

I've read that a heart rate monitor is only accurate during sustained (like 15 minutes or longer) high effort cardio in the Fat Burning Zone or a higher zone. Use of a heart rate monitor is likely to yield false calorie burns during activities other than running, cycling, cross-country skiing, swimming laps, rowing or similar activity. The calorie burn reported during cardio using data from the heart rate monitor is also subject to errors based upon the nominal population. So, any calorie compensation you claim for any exercise can send you down a very slippery slope toward an apparent plateau or weight gain when in fact eating back calories puts many people into an overeating mode. For many reasons, I now ignore calorie burns posted by Garmin et al, whether it be cardio or otherwise. I only use the HRM to maintain my level effort in a specific heart rate zone during that particular activity.

I guess it all depends on what you are trying to do. I pretty much use all these tools to create baselines for my body.
I adapt my input and output to my baselines.

In the case of Weight training vs digging 6' deep ditches or a triathlon... Which burns more calories? They are all burning calories, but how much? Noone here knows or can say without some tool to measure it.

TDEE, BMR.. they are all baselines for general guidance and so is a heart rate monitor. It's a tool. You can all do what you want, thankfully absolutes only apply in death and taxes.