Converting Minutes to MPH (miles per hour)
There are 60 minutes per hour. Divide 60 minutes by however many minutes you completed your mile. The answer is your pace as miles per hour.
For instance, you walked a 15 minute mile. 60 minutes / 15 minute mile = 4 mph
Here is a quick cheat sheet:
20 min mile = 3.0 mph 17 min mile = 3.5 mph 14 min mile = 4.3 mph 11 min mile = 5.45 mph 8 min mile = 7.5 mph
19 min mile = 3.2 mph 16 min mile = 3.75 mph 13 min mile = 4.6 mph 10 min mile = 6.0 mph 7 min mile = 8.57 mph
18 min mile = 3.3 mph 15 min mile = 4.0 mph 12 min mile = 5.0 mph 9 min mile = 6.67 mph 6 min mile = 10 mph