Multiply your per km pace, in seconds, by 1.609344, the number of kilometers in a mile. For example 5:00 per km is 300 seconds, times 1.609344 is about 483 seconds, so about 8:03 per mile. This converter does the math instantly and shows both units together.
Divide 60 by your pace in minutes per km to get km/h, then divide that by 1.609344 to get mph. A 5:00 per km pace is 12.0 km/h, which is about 7.46 mph.
6:00 per mile is about 3:44 per km, and works out to about 16.1 km/h. It also happens to be exactly 10.0 mph, since 60 minutes divided by 6 minutes per mile is 10 miles per hour.
A 5:00 per km pace equals 12.0 km/h, which converts to about 7.46 mph. The same pace is about 8:03 per mile.
At an even 5:00 per km, about 8:03 per mile, the marathon distance of 42.195 km takes about 3:30:59. The same even pace covers 10K in exactly 50:00 and a half marathon, 21.0975 km, in about 1:45:29.
The Pace Calculator solves time, distance or pace from any two of the three, in km or miles. This converter is the dedicated unit switcher: enter a pace or speed in any of four units, min per km, min per mile, mph or km/h, and see it instantly in the other three, plus what that pace means as a finish time across the four standard race distances.