Hydraulic Head Pressure Calculator
Convert liquid column head into the pressure it produces at the bottom under static conditions.
How to use this calculator
- Enter liquid density, vertical liquid head and the gravitational acceleration appropriate to the location.
- Check that every input uses the stated units and covers the same period, population or project scope.
- Change one assumption at a time when comparing scenarios.
Formula used by hydraulic head pressure calculator
p = ρgh
- p = ρgh
- It excludes atmospheric pressure, velocity effects, pipe losses, water hammer and changing elevation along a flowing system.
- Inputs are validated against the tool-specific constraints; displayed results are rounded for readability.
Worked examples
Worked example
A 12-metre column of water produces about 117.7 kPa of hydrostatic gauge pressure.
The calculator reports pressure in kilopascals and bar from density, head and gravity.
The calculator reports pressure in kilopascals and bar from density, head and gravity.
Understanding the result
Convert liquid column head into the pressure it produces at the bottom under static conditions.
It excludes atmospheric pressure, velocity effects, pipe losses, water hammer and changing elevation along a flowing system.
Important notes
It excludes atmospheric pressure, velocity effects, pipe losses, water hammer and changing elevation along a flowing system.
Treat the result as an estimate for the assumptions entered; verify important specifications against the relevant source or professional guidance.
Frequently asked questions
Is this absolute pressure?
No. It is gauge pressure from the liquid head, excluding atmospheric pressure.
Does this model a flowing pipe?
No. Flowing-system pressure requires additional losses and boundary conditions.
How should I use this result?
Enter liquid density, vertical liquid head and the gravitational acceleration appropriate to the location.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.