KPH to MPH Converter

How to convert kilometers per hour to miles per hour

1 kilometer per hour = 0.6213711922 miles per hour. To convert kilometers per hour to miles per hour, divide by 1.609344 (or multiply by 0.6213711922). One kilometer per hour is 1,000 m covered in one hour. One mile per hour is 1,609.344 m covered in one hour.

Worked examples

• 50 kilometers per hour = 31.0686 mph (50 ÷ 1.609344)
• 100 kilometers per hour = 62.1371 mph (100 ÷ 1.609344)
• 130 kilometers per hour = 80.7783 mph (130 ÷ 1.609344)

Where this conversion comes up

Kilometers per hour are used for speed limits in most of the world and wind speed in forecasts; miles per hour for speed limits and car speedometers in the US and UK. For driving abroad and reading car specs. Common limits: 50 km/h is 31 mph, 100 km/h is 62 mph and 130 km/h (French motorways) is 81 mph.

Quick estimate

Multiply by 0.6 and add a bit (exact factor 0.6214).

Common mistakes

• Multiplying instead of dividing. A mile per hour is larger than a kilometer per hour, so the number of miles per hour must come out smaller: 50 kilometers per hour = 31.0686 mph.
• Rounding too early. Keep the full factor until the last step; rounding 0.621 to 0.6 first puts large values noticeably off.

Going the other way? Use the mph to kph converter. Related speed converters: knots to mph, mph to knots, mph to m/s, m/s to mph, fps to mph, mph to fps.