About this mph to km/h converter
Road signs in the United States and the UK show speeds in miles per hour, while most other countries use kilometers per hour. Since a mile is exactly 1.609344 kilometers, 60 mph is 96.56 km/h and 100 km/h is 62.14 mph. This converter works in both directions and also gives the speed in meters per second, used in science and sport, feet per second, and knots, used at sea and in aviation. A gauge shows both scales side by side, a short description puts the speed in context, and the nearest common US and European speed limits help when you drive abroad.
How to convert mph to km/h
- Choose the direction. Pick Miles per hour → km/h or Kilometers per hour → mph.
- Enter the speed. Type the number, or press an example such as 70 mph → km/h.
- Press Convert speed. Read the speed in every unit, the gauge, and the nearest speed limit signs.
Frequently asked questions
How do I convert mph to km/h in my head?
Multiply by 1.6, or add 60%. 50 mph is about 80 km/h. For km/h to mph, multiply by 0.6 and add a little: 100 km/h is about 62 mph.
Is 100 km/h faster than 60 mph?
Yes, slightly. 100 km/h is 62.14 mph, while 60 mph is 96.56 km/h.
What is a knot?
One nautical mile per hour, exactly 1.852 km/h or about 1.151 mph. Ships and aircraft measure speed in knots.
How are meters per second worked out?
Divide km/h by 3.6, because an hour has 3,600 seconds and a kilometer 1,000 meters. 36 km/h is exactly 10 m/s.