kilometer per second
Speedexact by definition
The kilometre per second is exactly 1,000 metres per second. It is the natural unit wherever speeds are astronomical or seismic: Earth's orbital speed is 29.8 km/s, escape velocity from its surface 11.2 km/s, P-waves travel through the crust at 5 to 8 km/s, and galaxy redshifts are reported as recession velocities in km/s.
| 1 | 1,000 |
One kilometer per second in every speed unit
| 31,557,600,000,000 | millimeter per year (mm/yr) | |
| 86,400,000,000 | millimeter per day (mm/day) | |
| 3,600,000,000 | millimeter per hour (mm/h) | |
| 3,401,570,000 | inch per day (in/day) | |
| 283,465,000 | foot per day (ft/d) | |
| 141,732,000 | inch per hour (in/h) | |
| 86,400,000 | meter per day (m/d) | |
| 60,000,000 | millimeter per minute (mm/min) | |
| 3,600,000 | meter per hour (m/h) | |
| 2,362,200 | inch per minute (in/min) | |
| 1,000,000 | millimeter per second (mm/s) | |
| 196,850 | foot per minute (ft/min) | |
| 100,000 | centimeter per second (cm/s) | |
| 60,000 | meter per minute (m/min) | |
| 39,370.1 | inch per second (in/s) | |
| 3,600 | kilometer per hour (km/h) | |
| 3,280.84 | foot per second (ft/s) | |
| 2,236.94 | mile per hour (mph) | |
| 1,943.84 | knot (kn) | |
| 1,000 | meter per second (m/s) | |
| 2.93864 | mach (sea level) (Ma) | |
| 1 | kilometer per second (km/s)this unit | |
| 0.00000333564 | speed of light (c) |
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