Marathon Calculator

This marathon calculator tells how fast you have to run shorter distances to make your goal time at the marathon. It is good for setting goal times to be used during training. Find out how fast world record holder have to run the shorter distances. Can you keep up the pace for even a mile?

Marathon Goal Time:

Would you like to make the better by answering a few short questions?

How to Use the Calculator?: 

Just enter your marathon goal time and press calculate. Split times for various shorter distances will be shown. Try out the world record (2:03:23, Wikipedia) or my personal record (3:54:36). See if you can keep up with the pace.

The prediction is based on the formula developed by Pete Riegel and published first in a slightly different form in Runner's World, August 1977. The formula is T2 = T1 x (D2/D1)^1.06. T2 is the predicted time and D2 is the distance for prediction. T1 is a known time for the distance D1. So in this calculator the D1 is the distance of the marathon (41.195 km) and T1 is the time you set to the fields. T2 is calculated for various distances D2. Just try it out and you see what I mean.


Marathon is long-distance running event with an official distance of 42.195 kilometres (26 miles and 385 yards). It is the distance between Marathon and Athens in Greece. The event is loosely based on the event in Greek mythology where a messenger run this distance to announce the Greek victory over the Persians. However this common perception is not entirely accurate. See this Wikipedia article for more information.