MPH to KM/H Converter
Convert miles per hour to kilometres per hour and back in either direction. Type a value into either field below and the other updates instantly. 1 mph = 1.609344 km/h.
One mile per hour equals 1.609344 kilometres per hour. To convert mph to km/h, multiply by 1.609344. To convert km/h to mph, divide by 1.609344 (or multiply by 0.6213711922).
How to convert mph to km/h
MPH to KM/H conversion table
Frequently asked questions
How many km/h is 1 mph?
One mile per hour equals 1.609344 kilometres per hour. This is the same factor as miles to kilometres, applied to speed.
How do I convert mph to km/h?
Multiply the speed in mph by 1.609344. For example, 60 mph × 1.609344 = 96.56 km/h. The calculator above does this instantly in both directions.
How do I convert km/h back to mph?
Divide the speed in km/h by 1.609344 (or multiply by 0.6213711922). For example, 100 km/h ÷ 1.609344 = 62.14 mph. Type a value into the km/h field above and the mph field updates automatically.
What is 70 mph in km/h?
70 mph equals 112.65 km/h (70 × 1.609344 = 112.6541). This is the UK dual carriageway and motorway speed limit.
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