Here’s another great online resource I use for running.
The Cool Running Pace Calculator allows me to calculate goal paces and race potential.
It include 3 variables:
You just need to enter 2 of the variables, and it will calculate the third.
For instance, a question I often ask myself is: “If I could maintain that pace for a marathon, what would my time be?”
So I enter the pace in question (pace), and the marathon (distance), then calculate the goal time.