Marathon prediction calculator - Race pace calculation

The marathon calculator is based on Peter Riegel’s formula of: t2 = t1 * (d2 / d1) ^1.06. A simple explanation of this formula is t1 equals the initial time, d1 equals the initial distance, d2 equals the new distance being calculated, and t2 equals the predicted time for the new distance. This formula has sustained well over time, and has the advantage of simplicity. It says, roughly speaking, that a person's speed declines by around 6% when the distance doubles. Once you have entered in you distanced raced, and how long it took you, enter in your calculated predicted race time, click on enter. This will give you your racing time prediction in hours, minutes, and seconds it also gives you the target split time in minutes and seconds.

Back to calculator

Our online free calculators are digital gadgets that were programmed to perform specific calculations for various tasks and duties. They were built to work just like normal calculators with one goal in mind – to provide you with the necessary information to make better choices in life.