How this tool works
The calculator normalises each value to metres per second. One mph is exactly 0.44704 m/s and one international knot is one nautical mile per hour.
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Speed Converter
Compare road, marine, aviation and scientific speed units without switching between separate pages.
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When it is useful
Useful for overseas speed limits, running and cycling pace comparisons, wind forecasts, boating, aviation and physics calculations.
Accuracy and unit standards
A knot is based on the international nautical mile of exactly 1,852 metres. Results are suitable for everyday conversion; operational navigation should use approved instruments.