I am looking for a way to accurately workout how many calories I am burning on my bike. I have a standard bike mounted on a cycle exercising stand. At the moment, I have no way of working out anything. I only have a heart rate monitor.
There's a VERY accurate approach, but it requires being in a lab and having equipment hooked up to you.
Another approach is using a calories burnt calculator. (If you look up calorie burned calculator you'll find dozens - they should be based on type of exercise, your weight and the exercise duration).
Some points to keep in mind: