knot
knspeed · International · Modern
1 knot = 1 international nautical mile per hour = exactly 1852/3600 m/s.
informal Converter
speed · International · Modern
mile per hour
mphinformal
- Record
- M308
- Definition quality
- Standardized
- Conversion mode
- multiplicative
- Calculator
- Fully calculable
Definition
1 mile per hour = exactly 0.44704 m/s from the exact international mile and 3600-second hour.
Reference value
One mile per hour is exactly 0.44704 metre per seconds.
History & use
A conventional everyday road-speed unit in the U.S. and UK.
Modern use
Modern use is context-dependent and varies by region or measurement system.
Did you know?
1 mph = exactly 1.609344 km/h.
Sources & evidence
Related measurements
speed · SI · Modern
The metre per second is the coherent SI derived unit of speed, m/s.
speed · Metric / accepted with SI · Modern
1 km/h = 1000 m / 3600 s = 5/18 m/s exactly.