It is calculated by Loseit. It basically compares what Loseit expected you to burn to your fitbit burn and it is the difference (I believe if you burned more than loseit expected, it has been a while since I've used loseit.When I used it, it didn't subtract calories if you burned less than loseit expected.) So loseit expected me to burn about 1800 calories from being alive and some general activity in the day, if my fitbit burn was 2,000 I would see a 200 calorie fitbit adjustment on loseit.com.
Sam | USA
Fitbit One, Macintosh, IOS
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