Pressure & Density Calculator
Choose which variable to solve for, enter the other three values, and calculate the hydrostatic pressure caused by a column of fluid.
How It Works
This calculates hydrostatic pressure — the pressure caused by the weight of a fluid column above a given depth. It applies specifically to fluids at rest under gravity, not as a universal relationship between pressure and density in every physical situation.
Formula
P = ρ × g × h, where P is pressure, ρ is fluid density, g is gravitational acceleration, and h is height/depth of the fluid column.
Example
Water (density 1000 kg/m³) at a depth of 10 meters, under standard gravity, exerts a pressure of approximately 98.07 kPa.
Frequently Asked Questions
- What value of gravity does this use by default?
- Standard gravitational acceleration, 9.80665 m/s², though you can change it for other planets or contexts.
- Does this include atmospheric pressure?
- No, this calculates only the additional pressure from the fluid column itself. Add atmospheric pressure separately if you need total (absolute) pressure.
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