Velocity
Convert kilometre per hour (km/h) to mile per hour (mph). Velocity is distance per unit time — the line-sizing quantity that flags erosion, noise, and pressure drop.
1 km/h = 0.6213712 mph
To convert kilometre per hour to mile per hour, multiply the km/h value by 0.6213712. To go the other way, divide by 0.6213712 (or multiply by 1.609344).
| km/h | mph |
|---|---|
| 1 | 0.6213712 |
| 2 | 1.242742 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 25 | 15.53428 |
| 50 | 31.06856 |
| 100 | 62.13712 |
| 250 | 155.3428 |
| 500 | 310.6856 |
| 1000 | 621.3712 |
Line velocities are checked in m/s or ft/s against service-specific guidance bands.
High velocity means high friction loss and erosion risk; low velocity risks settling in slurry lines.
Worked example. A velocity of 7.2 km/h is 4.473873 mph.
Multiply the value in km/h by 0.6213712 to get mph. For example, 10 km/h = 6.213712 mph.
1 km/h equals 0.6213712 mph.
Line velocities are checked in m/s or ft/s against service-specific guidance bands.