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HYDROSTATIC PRESSURE CALCULATOR

This hydrostatic pressure calculator computes the pressure in a static fluid at a given depth using the hydrostatic equation p = ρgh + p0 or p = γh + p0. You can enter either fluid density ρ with gravitational acceleration g, or the specific weight γ, together with depth h and reference pressure p0, to obtain the absolute pressure at depth.

KNOWN PARAMETERS
INPUT PARAMETERS
Density [ρ]
Specific Weight [γ]
Gravity [g]
Depth [h]
Reference Pressure [p₀]

Note: Use dot "." as decimal separator.

RESULTS
Pressure [p] ---- bar

Pressure vs depth (visualization)

Hydrostatic pressure formula

For an incompressible fluid at rest, the pressure at a depth h below the free surface is: p = ρgh + p0 or equivalently p = γh + p0, where ρ is the fluid density, g is gravitational acceleration, γ is specific weight, and p0 is the free surface (reference) pressure. This calculator implements these equations and supports both SI and US customary units.

How to use this hydrostatic pressure calculator

  • Select whether you want to work with fluid density and gravity or with specific weight.
  • Enter the known fluid property (ρ or γ) in the chosen units.
  • Specify the depth below the free surface and choose the depth unit (mm, m, inch, ft).
  • Enter the reference pressure p0 (for example, 1 bar for atmospheric pressure).
  • Choose the desired output pressure unit and click Calculate (or simply edit any field) to update the result instantly.

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