MPH to KM/H converter

How to convert miles per hour to kilometers per hour

To convert miles per hour to kilometers per hour, use km/h = mph × 1.60934. For example, 60 mph is 96.5606 km/h. Type any value in the converter above and the result updates instantly.

The MPH to KM/H formula

The conversion is km/h = mph × 1.60934. One mile per hour equals 1.60934 km/h. This conversion is exact: mile per hour is defined precisely in terms of kilometer per hour, so the only rounding is in the digits shown.

MPH to KM/H conversion table

Where miles per hour and kilometers per hour are used

Miles per hour is the speed unit on road signs in the United States and the United Kingdom.

Kilometers per hour is the speed unit on road signs and vehicle instruments in most of the world.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 10 mph = 16.0934 km/h
• 30 mph = 48.2803 km/h
• 50 mph = 80.4672 km/h

Converting miles per hour to kilometers per hour in your head

Multiply by 1.6: 60 mph is about 96 km/h (exactly 96.56 km/h).

KM/H to MPH reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Speed limits, aviation and sailing use different units: knots are used at sea and in the air, not on roads.
• Rounded rules of thumb are fine for driving estimates but not for precise engineering calculations.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the KM/H to MPH converter.