Speed Converter

Convert between miles per hour, kilometers per hour, meters per second, knots, and more.

Speed Conversion

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Common Speed Conversions

mph to kph
kph to mph
m/s to kph
kph to m/s
knots to mph
mph to knots

mph to m/s
m/s to mph
km/s to mph
mph to km/s
ft/s to m/s
m/s to ft/s

Speed is the rate at which an object covers distance. It is a scalar quantity, meaning it has magnitude but no direction (unlike velocity, which is a vector).

The most common units of speed are miles per hour (mph) in the US and UK, kilometers per hour (kph) in most other countries, and meters per second (m/s) in scientific contexts. Other units include knots (used in aviation and maritime), and feet per second (ft/s).