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Converters

Speed Converter

Convert speeds for driving, running, sailing and physics. Knots are included because sea and air speeds are quoted in them — a knot is one nautical mile per hour, not one land mile per hour.

kilometres per hour to miles per hour

0.6214 mph

1 km/h converted

1 km/h equals
0.6214 mph
Conversion factor
Exact by definition

How to use this tool

  1. Enter the speed you want to convert.
  2. Choose the unit you have and the one you want.
  3. Use swap to reverse the direction.

Worked examples

A 100 km/h speed limit in mph

  1. 100 ÷ 1.609344 = 62.137

About 62 mph.

A 4-minute kilometre pace in km/h

  1. 60 minutes ÷ 4 minutes per km = 15

15 km/h.

Notes and limitations

  • A knot is one nautical mile per hour, which is 1.852 km/h. It is not the same as a mile per hour.
  • All the factors in this category are exact by definition.
  • Running and cycling pace is usually quoted as time per distance rather than distance per time. To convert a pace to a speed, divide 60 by the minutes per kilometre or mile.

Frequently asked questions

How do I convert km/h to mph?

Divide by 1.609344. As a rough mental check, multiply by 0.6 — 100 km/h is about 60 mph, and the true figure is 62.

How fast is a knot?

1.852 km/h, or about 1.151 mph. It is one nautical mile per hour, which is why it is used at sea and in the air.

How do I convert m/s to km/h?

Multiply by 3.6. A sprinter at 10 m/s is running at 36 km/h.

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