Head/Pressure Conversion
Pressure can be measured either as part of a scale (e.g. bar, pascals, psi) or in terms of the height of a fluid (e.g. metres of water). The higher the height of liquid, the greater the pressure it exerts at it’s base.
Pressure gauges typically incorporate scaled measurements whereas pump performance is measured by its head – ie what height it can pump a fluid to.
It is therefore useful to be able to convert between the two measurements.
Table of Pressure Conversions for Water at 4°C
| Head | Pressure | ||
| metres | feet | bar | psi |
| 0.50 | 1.64 | 0.05 | 0.71 |
| 1.00 | 3.28 | 0.10 | 1.42 |
| 1.50 | 4.92 | 0.15 | 2.14 |
| 2.00 | 6.56 | 0.20 | 2.85 |
| 5.00 | 16.40 | 0.49 | 7.12 |
| 10.00 | 32.81 | 0.98 | 14.24 |
| 15.00 | 49.21 | 1.47 | 21.36 |
| 20.00 | 65.62 | 1.96 | 28.48 |
| 30.00 | 98.43 | 2.94 | 42.72 |
| 40.00 | 131.23 | 3.92 | 56.96 |
| 50.00 | 164.04 | 4.91 | 71.19 |
| 100.00 | 328.08 | 9.81 | 142.39 |
| 150.00 | 492.13 | 14.72 | 213.58 |
| 200.00 | 656.17 | 19.62 | 284.78 |
| 500.00 | 1640.42 | 49.05 | 711.94 |
| 1000.00 | 3280.84 | 98.10 | 1423.88 |