Velocity
Convert kilometre per hour (km/h) to foot per second (ft/s). Velocity is distance per unit time — the line-sizing quantity that flags erosion, noise, and pressure drop.
1 km/h = 0.9113444 ft/s
To convert kilometre per hour to foot per second, multiply the km/h value by 0.9113444. To go the other way, divide by 0.9113444 (or multiply by 1.09728).
| km/h | ft/s |
|---|---|
| 1 | 0.9113444 |
| 2 | 1.822689 |
| 5 | 4.556722 |
| 10 | 9.113444 |
| 25 | 22.78361 |
| 50 | 45.56722 |
| 100 | 91.13444 |
| 250 | 227.8361 |
| 500 | 455.6722 |
| 1000 | 911.3444 |
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 6.56168 ft/s.
Multiply the value in km/h by 0.9113444 to get ft/s. For example, 10 km/h = 9.113444 ft/s.
1 km/h equals 0.9113444 ft/s.
Line velocities are checked in m/s or ft/s against service-specific guidance bands.