The world's most popular running calculator

Now available for iOS.

Why McRun?

  1. Predict your race times from 400 meters to 100 miles, in miles or kilometers
  2. Get precise training paces for maximum improvement
  3. Scientifically-based, runner proven

How-To Video

Greg McMillan shows you how to calculate race times and training paces using the McRun app.


Here's a preview of what you'll see when you download the McRun app

Download McRun Now