Cycling Performance Predictor
This calculator estimates your cycling time and pace for any distance given any other actual cycling distance and time.  The calcuator uses Pete Riegal's model, and appears in his article "Althletic Records and Human Endurance," in American Scientist, May-June 1981.

NOTE: Like any model, the estimate isn't perfect.  In general, the calculator works much better at estimating longer distances, and distances that are relatively close to each other. Ex.: The estimate for your 10 km time will be more accurate if you enter your 5 km time instead of your 400 m time.
Instructions
Input your cycle time broken down into hours, minutes, seconds, and hundredths of seconds.  You MUST enter no more than two digits in each Time text box, but you may leave those text boxes blank that don't apply for your cycle (e.g. hours for 500 meters).  Input the distance of your actual cycle and select the appropriate units; meters, km, yards, or miles.

Next input a value for the cycle distance you want to estimate and select the appropriate units for that cycle.

Click the calculate button.  The estimated cycle time and pace will be displayed below.

NOTE: Estimated Pace will be provided in km/h if your entered cycle is in meters or km, and in mph if your entered cycle is in yards or miles.
 
Time km/h h m s f h m s f Distance Cycled Estimated Time Estimated Pace Distance to Calculate