How many calories do you burn while doing arobic excerises?

[JEDI]

According to the elipical machines, i'm burning 200 calories. i use it for 20 min

is 200 calories too little? if so, how high should i go?

Edit:

What machine do you use, and how many minutes r u on it?

 

[LeStEr]

25 mins eliptical ~425 calories.

 

[Dunbar]

I've found those to be a bit optimistic, perhaps the marketing folks had too much input. I'll run 2.5 miles or so and it says I burned 400 calories. From what I've read it is more like 300 calories.