Enter your weight, the miles ridden, your average speed, and then click on the "Calculate" button. The program will output the estimated calories burned during your ride, along with an appropriate comment.
The average speed entered must be between 8 mph and 25 mph. If your speed falls outside these parameters you are either very slow or very fast!
Thanks to Dynamic Drive for the DHTML script used for the cool page-intro effect. This JavaScript cycling calculator is based on a runner's calorie calculator found at JavaScript Source. Calculations are taken from a rider's log book published by Bicycling Magazine.