McRun is the official app version of the well-known McMillan Running Calculator. Created by internationally recognized coach Greg McMillan, this calculator allows you to compute your running potential across different distances. You only need to input your best time from one distance and McRun does the rest. The app will tell you how fast you are capable of running from 100 yards to 100 miles. It also suggests optimal training paces based on both your fitness level and the type of runner you are.

McRun is a great way to target and train for peak performance.

Feedback? Suggestions? Sore legs?
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Quick start guide:
- From Calculator screen enter your best time in any distance and press “calculate”
- View your equivalent race times
- Press “Workout Paces” to see recommended paces for tempo runs, long runs, easy runs, and speed workouts
- Select “Recalculate” to return to the Calculator screen
- Turn your iPhone sideways to see motivational quotes and training tips