Editing Speed (section)

==Units==
{{main|Conversion of units#Speed or velocity}}
Units of speed include:
*[[metres per second]] (symbol m&nbsp;s<sup>−1</sup> or m/s), the [[SI derived unit]];
*[[kilometres per hour]] (symbol km/h);
*[[miles per hour]] (symbol mi/h or mph);
*[[knot (unit)|knots]] ([[nautical mile]]s per hour, symbol kn or kt);
*[[Foot per second|feet per second]] (symbol fps or ft/s);
*[[Mach number]] ([[dimensionless]]), speed divided by the [[speed of sound]];
*in [[natural units]] (dimensionless), speed divided by the [[speed of light]] in vacuum (symbol ''c'' = {{val|299792458|u=m/s}}).

{{Speed conversions}}