Hydrostatic Pressure Calculator
Calculate pressure at depth in static fluids
About this calculator
The Hydrostatic Pressure Calculator determines the pressure exerted by a static fluid at any given depth below the surface. This tool is essential for engineers, divers, marine biologists, and construction professionals who need to calculate water pressure in tanks, underwater structures, or diving applications. It uses the fundamental hydrostatic pressure formula P = ρgh, where pressure increases linearly with depth, fluid density, and gravitational acceleration.
How to use
Enter the fluid density (typically 1000 kg/m³ for water), the depth below the surface in meters, and select your desired pressure units. The calculator will instantly compute the hydrostatic pressure at that depth. Add atmospheric pressure if you need absolute pressure rather than gauge pressure.
Frequently asked questions
What is hydrostatic pressure?
Hydrostatic pressure is the pressure exerted by a fluid at rest due to gravitational force, increasing proportionally with depth below the surface.
Why does pressure increase with depth?
Pressure increases with depth because the weight of the fluid column above creates additional force pressing down on lower levels.
What's the difference between gauge and absolute pressure?
Gauge pressure measures pressure relative to atmospheric pressure, while absolute pressure includes atmospheric pressure in the total measurement.