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Speed converter

Convert km/h, mph, m/s and knots.

Answer

Type a number to convert.

Converted
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How
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Worked out in your browser. Nothing you type is sent anywhere.

How to convert speed

Type a speed and choose the units. All other units are listed under the answer.

Handy values

  • 100 km/h = 62.14 mph.
  • 1 m/s = 3.6 km/h.
  • 1 knot = 1.852 km/h, used at sea and in the air.

What is the motorway speed limit in mph?

120 km/h is about 74.6 mph.

Is anything I type saved?

No. The numbers are worked out in your browser and are not sent anywhere.