| Speed | |||||||
|---|---|---|---|---|---|---|---|
| system | unit | code (alternative) |
symbol or abbrev. |
notes | sample default conversion |
combinations | |
| SI | metre per second | m/s | m/s | US spelling: meter per second |
1.0 m/s (3.3 ft/s) |
| |
| non-SI metric | kilometre per hour | km/h | km/h | US spelling: kilometer per hour |
1.0 km/h (0.62 mph) |
| |
| Imperial & US customary |
mile per hour | mph | mph | 1.0 mph (1.6 km/h) |
| ||
| mile per second | mi/s | mi/s | 1.0 mi/s (1.6 km/s) |
| |||
| foot per second | ft/s (foot/s) | ft/s | long code "foot/s" outputs foot per second (and never feet) | 1.0 ft/s (0.30 m/s) |
| ||
| furlong per fortnight | furlong per fortnight | (none) | 1.0 furlong per fortnight (0.00060 km/h; 0.00037 mph) | ||||
| Aeronautical units | knot | kn (knot) | kn | 1.0 kn (1.9 km/h; 1.2 mph) | |||