Miles per Hour to Km/h (mph to km/h)

How to convert mph to km/h

Multiply the miles per hour by 1.609344:

km/h = mph × 1.609344

60 mph × 1.609344 = 96.56 km/h. The factor is exact: a mile is 1,609.344 meters, so a mile per hour is 1.609344 kilometers per hour. The result also shows meters per second and knots. To go the other way, use km/h to mph.

Mph to km/h chart

Speed limits in both units

U.S. drivers in Canada or Mexico, and visitors driving in the U.S., need both: Canadian signs give km/h, U.S. signs mph. Most speedometers show both scales, with the second one in smaller numbers. Rental cars in Canada and Mexico usually show km/h in large numbers, so a U.S. driver reading the outer scale by habit can be going 60% faster than intended. A Canadian highway limit of 100 km/h is 62 mph; 110 km/h is 68 mph.

A quick estimate

Multiply by 1.6, or add 60%: 50 mph plus 30 is about 80 km/h (exactly 80.47). For a closer answer, add 61%. Going the other way, take about 38% off: 100 km/h is about 62 mph. For running and cycling, speeds are low enough that the rule is exact to a tenth: 10 mph is 16.1 km/h.

Cycling, running and wind

Bike computers and running watches can show either unit. A comfortable cycling pace of 15 mph is 24.1 km/h; a 10 km/h jog is 6.2 mph, a pace of about 9:39 per mile. Weather apps give wind in mph in the U.S. and in km/h or m/s elsewhere: a 25 mph wind is 40 km/h, strong enough to make cycling hard. To convert a list of speeds from a training log, paste them into Convert a list of values below the converter.

Other speed units

Meters per second are used in science and for wind: 60 mph is 26.8 m/s. Ships and aircraft use knots — nautical miles per hour — and 60 mph is 52.1 knots. Distances convert with the same factor; for those, see miles to km and km to miles.