Here are a few of the most often needed conversion factors for speed. Speed, technically, is the scalar form of velocity, in that velocity (a vector) also provides direction of motion along with the value of speed.
Standard units = Meters per second (m/s)
| foot per sec | mile per hr | cm per sec | meter per sec | km per hr | knot |
| 1 ft/s = | 1 | 0.6818 | 30.48 | 0.3048 | 1.097 | 0.5925 |
| 1 mi/h = | 1.467 | 1 | 44.70 | 0.4470 | 1.609 | 0.8689 |
| 1 cm/s = | 3.281 * 10-2 | 2.237 * 10-2 | 1 | 0.01 | 3.600 * 10-2 | 1.944 * 10-2 |
| 1 m/s = | 3.281 | 2.237 | 100 | 1 | 3.600 | 1.944 |
| 1 km/h = | 0.9113 | 0.6214 | 27.78 | 0.2778 | 1 | 0.5400 |
| 1 knot = | 1.688 | 1.151 | 51.44 | 0.5144 | 1.852 | 1 |