When to use this calculator
This static-liquid model depends on vertical depth, not the shape or total volume of the container.
Explore the fluids & flow calculators for other questions in this topic. For a related calculation, use the Mass Flow Rate Calculator: Calculate mass flow from fluid density and volumetric flow.
PUTTING IT INTO PRACTICE
Hydrostatic Pressure: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Liquid density (kg/m³) | 1,000 |
| Gravity (m/s²) | 10 |
| Depth below surface (m) | 2 |
| Result | 20,000 Pa |
- Check the input labels and enter the example values above.
- Apply the relationship: Gauge pressure = density × gravity × depth.
- The result is 20,000 Pa, rounded for display.
How to interpret your result
Add surface absolute pressure separately if absolute pressure is required.
Use the fluid properties at the relevant conditions. Gauge pressure is measured relative to a reference and differs from absolute pressure. Average flow velocity and characteristic length must match the geometry being modelled.
Frequently asked questions
Should hydrostatic pressure be added to atmospheric pressure?
Add the surface absolute pressure when an absolute result is needed. The basic liquid-column calculation alone gives the pressure increase with depth.
When is the hydrostatic pressure calculator useful?
This static-liquid model depends on vertical depth, not the shape or total volume of the container.
How do I use the hydrostatic pressure calculator?
Enter liquid density (kg/m³), gravity (m/s²), depth below surface (m). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Gauge pressure = density × gravity × depth.
What should I check before using the result?
Add surface absolute pressure separately if absolute pressure is required.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
Further reading
For background on this topic, see OpenStax: fluids, density and pressure ↗. This is a topic reference, not an external review or endorsement of this tool.
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