How accurate is the calorie math?!

[Newbie465]

OK two days back to back. First day I burned more calories doing very little. 

Second day I spent an hour shoveling dirt into bins and dragging them 100 feet or so and yet I burned fewer calories. (And walked fewer steps somehow as if I'd gotten taller)

 

 

[JohnnyRow]

Clip mode or wrist mode?  I.E. are you getting heart rate recorded?

[Baltoscott]

The calorie count is a running total from midnight to midnight. It looks like your screenshots for both days was at 6pm - on the second day - so you are missing six hours of calorie burn for that day, but have all 24 hours of the first day. Exercise matters, but you burn probably 70% of your daily calories just keeping the lights on and staying out of the grave.

[Dimi6208]

This happened to me too!! It lowerred my average daily calories from 2.5 to almost 1.9k???