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Science
Speed Conversion Table
Values shown for 1 Meter per Second
About Speed Conversions
Where you measure speed decides the unit. Roads use kilometers per hour in most countries, miles per hour in the US and UK, fixed at 1 mph = 1.609344 km/h. Aviation runs on knots, one nautical mile per hour, where 1 knot is exactly 1.852 km/h; the nautical mile maps straight onto a minute of arc of latitude, which keeps navigation math clean. The Mach number rates speed against the local speed of sound (about 340 m/s at sea level, shifting with temperature and altitude) and drives aeronautics and supersonic design. Each factor below is exact, not rounded.
| Unit Name | Symbol | Value | Formula |
|---|---|---|---|
| Foot per Second | ft/s | 3.28084 | multiply by 0.3048 |
| Kilometer per Hour | km/h | 3.6 | divide by 3.6 |
| Knot | kn | 1.94384 | multiply by 1852/3600 |
| Mach | Ma | 0.00293867 | multiply by 340.29 (at sea level, 15ยฐC) |
| Meter per Second | m/s | 1 | base unit |
| Mile per Hour | mph | 2.23694 | multiply by 0.44704 |