Strength Training

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I have been doing body pump twice a week and my fitness specialist at the gym told me how many calories burned per session to enter. However, I have been doing some strength/resistance training other times during the week. When I enter them into My Exercise...it doesn't give be calories burned? I enter my reps and sets but doesn't give me any calories burned.

Is this something that needs to be fixed or I can I figure out how many calories I'm burning working the circuit?