Speed Converter

Convert speed: kilometers per hour, miles per hour, meters per second, knots and feet per second.

km/h = m/s × 3.6

Speed units and how they relate

One knot is one nautical mile (1,852 m) per hour. One mile per hour is exactly 0.44704 m/s.

UnitSymbolEquals in meters per second
1 meter per secondm/s1 m/s
1 kilometer per hourkm/h0.2777777778 m/s
1 mile per hourmph0.44704 m/s
1 knotkn0.5144444444 m/s
1 foot per secondft/s0.3048 m/s

Popular speed conversions

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Frequently asked questions

How accurate is this speed converter?

It uses the exact defined conversion factors for each unit and shows results to 10 significant digits. One knot is one nautical mile (1,852 m) per hour. One mile per hour is exactly 0.44704 m/s.

How do I convert meters per second to kilometers per hour?

Enter the value, choose meters per second in the "From" list and kilometers per hour in the "To" list. For example, 1 meter per second equals 3.6 km/h.

Is the converter free?

Yes. It is free, needs no sign-up and runs entirely in your browser, so it also works offline once the page has loaded.

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