I found this calculator. I used it to check my calories burned for 45 minutes on my Schwinn Aiirdyne at 70% of my age adjusted max heart rate. It gave me 430 calories burned. That is within a couple of calories of the estimate I use in Cronometer. I use a heart rate monitor on the Airdyne to keep me motivated. At any rate, a useful tool I’ve been wishing for that appears to be accurate…
