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Miles per hour to kilometres per hour, for US and UK speed limits read in metric, treadmill and cycling-computer settings, and vehicle specs quoted in one system while the rest of the document uses the other.
Frequently asked questions
What are common mph speed limits in km/h?
20 mph = 32.2 km/h, 30 mph = 48.3 km/h, 55 mph = 88.5 km/h, 65 mph = 104.6 km/h, 70 mph = 112.7 km/h. Note that countries don't sign the converted figure — they pick round numbers in their own system, so a 30 mph zone maps onto a 50 km/h zone rather than a 48.
How does this relate to running pace?
Pace is the inverse of speed, so a treadmill set to 6 mph (9.66 km/h) is running a 10-minute mile, or about 6:13 per kilometre. Convert the speed first, then divide 60 by the result to get minutes per kilometre.