Hello - How do I get burnt calories associated with my strength exercises?

I have used a different site for a long time, but have more friends on here and thought that would help with motivation... but still new and trying to figure out a few things... When I plug in cardio... I get an associated # of calories burned... when I plug in sets of push ups, sit ups, leg lifts, squats etc... I get no caloric values for the work out. I have not been bothering to plug in data.... I only do a few sets of this type of stuff every day... but some days I do a ton... so I'd like to see the calorie adjustment for it. Is this possible?