I'm new here and I have a questionnnnnn!!

Okay, on my profile, it says that it is estimated I lose 1900 calories a day. You know, that thing beside your food log... and it goes up like every minute? Yeah, that thing :) I checked my BMR.. online and it said 1498. I'm confused???

I'm 5'2, 142lbs, and 14 years old (Female)

BMR is what you would burn if you lied flat on your back all day and breathed.  the 1900 includes actual doing of things .