PSI to Head
Convert psi into head (feet of water) for pumps, valves, water systems, and hydraulic checks.
This converter treats head as feet of water.
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PSI to Head Table
| PSI | Head (feet of water) |
|---|---|
| 1 | 2.306658726 |
| 5 | 11.53329363 |
| 10 | 23.06658726 |
| 25 | 57.66646815 |
| 50 | 115.3329363 |
| 100 | 230.6658726 |
| 250 | 576.6646815 |
| 500 | 1,153.329363 |
| 1,000 | 2,306.658726 |
| 2,500 | 5,766.646815 |
Popular Conversions
- 1 psi = 2.306658726 head (feet of water)
- 5 psi = 11.53329363 head (feet of water)
- 10 psi = 23.06658726 head (feet of water)
- 25 psi = 57.66646815 head (feet of water)
- 50 psi = 115.3329363 head (feet of water)
- 100 psi = 230.6658726 head (feet of water)
- 250 psi = 576.6646815 head (feet of water)
- 500 psi = 1,153.329363 head (feet of water)
What is PSI and Head?
PSI
Definition: PSI means pounds per square inch and is a customary pressure unit.
History/origin: It became a standard engineering and industrial unit in US customary practice.
Current use: PSI is used in hydraulics, pneumatics, tires, compressors, and pressure gauges.
Head
Definition: Head is a fluid-pressure expression written as an equivalent fluid column height.
History/origin: It became a standard hydraulic concept because pumps and flow systems naturally relate energy to height.
Current use: Head is used in pumps, piping, water systems, and hydraulic calculations.
Related Hydraulic Conversions
Hydraulic and water-system work often mixes pressure, head, force, and flow estimates in the same check.
| Related Conversion | Factor or Rule | Formula |
|---|---|---|
| psi to feet of water | × 2.306658726 | ft H2O = psi × 2.306658726 |
| psi to inches of water | × 27.67990472 | in H2O = psi × 27.67990472 |
| psi to head | water assumption | head(ft) = psi × 2.306658726 |
| psi to gpm | needs Cv and SG | Q = Cv × sqrt(DeltaP / SG) |
| psi to lbs | needs area | lb = psi × area(in^2) |
| Pa to psi | × 0.000145037738 | psi = Pa × 0.000145037738 |
| psia to psig | minus atmosphere | psig = psia – atmospheric pressure |
| psig to psia | plus atmosphere | psia = psig + atmospheric pressure |
Typical Use Cases
Frequently Asked Questions
Q: Why do pressure pages like PSI to Head change the number so much?
A: Pressure units are sized very differently, so the same physical pressure can need a much larger or much smaller number after conversion. This converter treats head as feet of water.
Q: What does 1 psi become in head (feet of water)?
A: 1 psi equals 2.306658726 head (feet of water), which is a helpful checkpoint for tire pressure, hydraulics, vacuum work, and process instrumentation.
Q: When should I keep the original pressure unit?
A: Keep it when the sensor, regulator, gauge, or specification you are reading already uses that unit. Convert only when the destination document or tool expects another scale.
Q: Why do some pressure answers become decimals while others become large integers?
A: That is simply the size difference between the unit systems involved. The physical pressure stays the same.
Q: How do I convert Head (feet of water) back into PSI?
A: psi = head(ft) ÷ 2.306658726. That reverse relationship is useful when the reading already starts in the target pressure unit.
Q: Is this exact or approximate?
A: The converter uses a standard approximation, so the value is a practical estimate rather than an exact universal constant.