Vehicle Speed Converter
Convert between MPH, KPH, and other vehicle speeds
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Sources & References
International System of Units (SI): speed and velocity
Speed and velocity is measured in the metre per second (m/s); 1 mph = 0.44704 m/s. Conversions between SI and other units use exact, internationally agreed factors maintained by NIST.
International System of Units (SI)
Authoritative definitions for speed and velocity, from the BIPM SI Brochure (9th edition), the defining reference for the SI.