There is something wrong somewhere. I time myself in a 50 km loop every so often and the calculator shows me with a wattage of 320 W for a ride time in excess of 1 hour. Even though my loop isn't dead flat I'm considering it as flat with no wind. With my 90 kg body that puts me at 3.55 Watts/kg. This is way too high. I'm just an old (51), recreational/fitness rider. I'd say that for club riding (which I haven't done in a LONG time) I'd be considered a "B+" rider. I'm guessing that the local racers could probably ride me into the ground. Perhaps the difference is that I have my current bike set up so that even when riding on the hoods I'm not that upright and now I spend most of my time riding on the hoods. (On my old bike there was a much deeper drop in teh bars and I set it up so that I'd ride in teh drops 90+% of the time.) I don't see very much difference riding in the drops. Perhaps I see a 1 to 1.5 mph increase for the same effort when in the drops. The calculator shows a bigger change in speed going from the hoods to the drops than I realize in the real world.