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Speed Converter

From a US speed limit in mph to wind speed in knots: convert any speed exactly.

Result

62.137 mph

Result

Formula

Result = (value ร— from-factor) รท to-factor, relative to m/s

Every speed unit has a fixed conversion factor to metres per second (1 km/h = 1 รท 3.6 m/s, 1 knot = 0.514444 m/s). The calculator converts via m/s to the target unit.

Worked examples

100 km/h to mph

โ†’ 62.14 mph.

Common mistakes

  • Confusing knots (nautical miles per hour) with mph; a knot is slightly faster.

When to use it

  • Converting a US speed limit to km/h.

Frequently asked questions

Why does shipping use knots?

A knot is historically tied to nautical miles and latitude, which simplified navigation at sea.

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