I find the sparknotes calorie counter for cycling to be a gross overestimate.
The best way to get an idea of the amount of calories your burning is by measuring your power. If you have a means of doing this (gym bikes and spin bikes usually have power meters) than I suggest doing a few workouts on one and getting an idea of how hard your working at different power levels.
Once you have an accurate idea of exertion vs power output its very simple. Just multiply your power out put (in average watts/hour) by 3.6 and presto. You have your hourly calorie expenditure!
If I ride at 200 watts for 2 hours.
200 watts * 3.6=720 Calories per hour
Now, if I want to learn my total calories expended......
720 calories per hour * 2 hours=1440
200 watts is a pretty high power output for a non-racer but it was a nice round number for the example lol.
original poster- If you pm me I'll give you a fairly accurate estimate of you average calorie expenditure on the bike.
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