I broke down

Falcon

and bought a fitbit. Since I switched to a different job, I noticed I was dropping half a pound to a pound a day. I'm on my feet close to half the day at work so I changed my setting to light activity and it looks like I'm burning off an extra 500 cals a day according to the adjustment from the fitbit. I'm only consuming 2500 cals a day. That explains a lot.

heybales

Just to keep in the back of your mind as you watch weight changes.

If you think that 1/2 to 1 lb a day is fat weight - you'd be in a deficit of 1750 to 3500 each day.

If eating 2500 - does that mean you are burning 4250 to 6000 calories each day?

Fat is not fast - gained or lost.

Also be aware the Fitbit calcs are for average usage - some workouts, some jobs, some daily activity levels are very inflated.

Like if the device keeps slipping into HR-based calorie burn because it thinks you are working out, for long periods of time, and it's just barely a bump into exercise zone - badly inflated calorie burn.

Good job catching that you are easily a higher activity level, even more than Lightly-Active.
Sedentary job workers with kids in the evening hit that though - so probably higher still.