FitBit exercise/activity calories include BMR but BMR portion not deducted in Cronometer

edited May 3 in Ask An Expert

I understand FitBit calorie calculations for an exercise actually include BMR. It would seem to me that because Cronometer already accounts for BMR calories the BMR portion of the exercise entry would therefore need to be deducted from the calories synced in Cronometer. For example: my BMR = 66kcal/hr. If I do an exercise activity for one hour and FitBit estimates say 500kcal that would be 444kcal for the actual exercise itself and 66kcal being due to my BMR. So, I would expect 444kcal to be the number that should be input to Cronometer. But this is not what happens, instead the full 500kcal is recorded thus it seems to me it's doubling up on the BMR calories for that one hour exercise period.

Is my thinking correct on this or is there something I'm not understanding?


  • If you set your activity level to sedentary, crono won't adjust for your BMR and the numbers work out pretty good.

    "I've never considered excessive sanity a virtue" Mike Uris, San Antonio Express-News, 2002

  • I have crono activity set to 'none' which I believe is the correct thing to do when sync'd to a fitness tracker that provides both exercise activity data and general activity data. And unless someone can enlighten me furthehr I still believe Crono should deduct the BMR value from the BMR inclusive calorie numbers provided by FitBit.

Sign In or Register to comment.