As a runner probably you came across the fact that we use pace to measure our speed and that is expressed in min/km or min/mile depending on the system used. Conversion between them requires a few simple calculations that can be done using pen and paper or even in your head.
Have you ever tried to finish a race under a time limit? This calculator will help you determine the average pace you should run at to reach your goal. Maybe a marathon under 3 hours? Or a 5K under 25 minutes?
This calculator will help you to convert between paces determined in metric and imperial units. For the details about the math behind it read the how to guide.