376 Calories

That's how many calories WebMD says I burn on my daily bike commute. 

I'd never realized it could be that much.  I don't actually time myself, so it may actually be a few more (up to 411) if I'm going faster.  I'll assume the lower number though.

There are 3500 calories in a pound, so at this rate if I bike 10 days (9.3 days to be precise, but it's pretty hard to bike 0.3 round trips to work) and otherwise have a neutral food intake, I'll lose a pound. 

Seems like another good reason to bike to me!  I'm trying to lose 12 pounds from where I was at the beginning of this year.  I'm halfway there now... only 55 round-trips to work to go - which would happen in late August if I keep up current patterns.  I'm hoping it doesn't take quite that long - and now that I know how many calories I'm burning, perhaps it won't!