Calorie expenditure calculations?

[jayjay]

I have a similar aching question about how many calories burned does one hour of riding amount to.

I ride steep hills mostly , as I live on top of a peak along a ridge of lesser peaks. If I were to hop on my bike from my front door, and coast until I stopped, I'd be about 6 miles down the road, from 2000elevation to probably about 60 ft over sea level. So all my local little rides involve a lot of climbing. So, just today, I rode 12 miles, but coasted half of it. Riding uphill for only 6, as for every incline there's a decline. Does it all factor in? If I ride 2 hours on any given ride, be it flat or hills, the average might be the same, so, I'm just wondering.