speed · International · Modern
1 mile per hour = exactly 0.44704 m/s from the exact international mile and 3600-second hour.
informal Converter
speed · Metric / accepted with SI · Modern
kilometre per hour
exact
- Record
- M023
- Definition quality
- Exact by definition
- Conversion mode
- multiplicative
- Calculator
- Fully calculable
Definition
1 km/h = 1000 m / 3600 s = 5/18 m/s exactly.
Reference value
One kilometre per hour is exactly 0.2777777778 metre per seconds.
Modern use
Modern use is context-dependent and varies by region or measurement system.
Sources & evidence
Related measurements
knot
knspeed · International · Modern
1 knot = 1 international nautical mile per hour = exactly 1852/3600 m/s.
informalspeed · SI · Modern
The metre per second is the coherent SI derived unit of speed, m/s.