Estimate race time for competition running

Alternative name: Calculator for estimating new race time based on old race time

If you are planning to race a new distance and want to estimate how fast you can run this new distance, then this calculator is for you. This race calculator predicts how quickly you can finish a race you have not run before.


Estimated race time at new distance: 2 hours, 43 minutes, 6 seconds

The results in this prediction is based on the formula proposed by Pete Riegel.

Our calculations

At Calculatorian, we are keen to share our knowledge, be transparent and open to feedback. Here are the calculations used to create this calculator. If you find an error or deficiency, contact us and we'll fix it in an instant!

Estimated race time at new distance was calculated like this:

Step 1

First we need to calculate the variable tis. tis = Time in minutes.

Step 2

Finally we put it together and calculate it like this:

Variables used in this formula

distance = Distance you know your race time at (kilometers)
hh = Hours
mm = Minutes
ss = Seconds
newDistance = Race distance to be predicted