Hydrostatic Pressure

Calculate fluid pressure with depth and surface pressure.

Your numbers

Gauge pressure increase

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Idealized SI-unit model for educational estimates. Confirm material properties, boundary conditions and applicability before engineering use.

Formula

Use P = Pₛ+ρgh. Pₛ is absolute surface pressure in Pa, ρ is fluid density in kg/m³, g is gravity in m/s², and h is depth in m. Absolute pressure P is in Pa.

Calculate fluid pressure with depth and surface pressure.

Worked example

Density (kg/m³): 1000
Gravity (m/s²): 9.80665
Depth below surface (m): 10
Absolute surface pressure (Pa): 101325

Gauge pressure increase: 98,066.5 Pa
Absolute pressure: 199,391.5 Pa

Scope and limitations

Idealized SI-unit model for educational estimates. Confirm material properties, boundary conditions and applicability before engineering use.

Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.

Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.

Formula version: ed0117a6f86a · Example checked: 2026-10-30

Methodology