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Engineering ToolBox > Velocity Head
Velocity head can be expressed as
h = v2/2g (1)
where
v = velocity (ft/s, m/s)
g = acceleration of gravity (32.174 ft/s2, 9.81 m/s2)
Heads at different velocities can be taken from the table below:
| Velocity - v - (ft/sec) | Velocity Head - v2/2g - (ft Water) |
| 0.5 | 0.004 |
| 1.0 | 0.016 |
| 1.5 | 0035 |
| 2.0 | 0.062 |
| 2.5 | 0.097 |
| 3.0 | 0.140 |
| 3.5 | 0.190 |
| 4.0 | 0.248 |
| 4.5 | 0.314 |
| 5.0 | 0.389 |
| 5.5 | 0.470 |
| 6.0 | 0.560 |
| 6.5 | 0.657 |
| 7.0 | 0.762 |
| 7.5 | 0.875 |
| 8.0 | 0.995 |
| 8.5 | 1.123 |
| 9.0 | 1.259 |
| 9.5 | 1.403 |
| 10.0 | 1.555 |
| 11.0 | 1.881 |
| 12.0 | 2.239 |
| 13.0 | 2.627 |
| 14.0 | 3.047 |
| 15.0 | 3.498 |
| 16.0 | 3.980 |
| 17.0 | 4.493 |
| 18.0 | 5.037 |
| 19.0 | 5.613 |
| 20.0 | 6.219 |
| 21.0 | 6.856 |
| 22.0 | 7.525 |