How do I calculate hydrostatic pressure at a given depth?

Enter the fluid density, the vertical depth below the surface, and the gravitational acceleration. The calculator multiplies density × depth × gravity to give the pressure.

What is the difference between gauge pressure and absolute pressure?

Gauge pressure measures pressure relative to atmospheric pressure, while absolute pressure includes the atmospheric pressure acting on the fluid surface.

Can I use this calculator for gases as well as liquids?

The tool is designed for homogeneous fluid columns; for most practical purposes it applies to liquids, but the same equation works for gases if you use the gas density at the given conditions.

What units should I use for depth and density?

Depth is typically entered in meters or feet, and density in kilograms per cubic meter or pounds per cubic foot; the calculator will convert accordingly to output pressure in pascals, atmospheres, or other common units.

Does the calculator account for surface pressure like wind or atmospheric pressure?

Omni Calculator does not include surface pressure by default; if you need to include atmospheric or additional surface pressure, use Kitset which has a dedicated input for that value.

Classical Mechanics2 options compared

Hydrostatic Pressure Calculator

Calculates hydrostatic pressure based on depth, density of fluid, and gravitational acceleration. User inputs these parameters to determine the pressure at a given point in a liquid or other homogeneous fluid column. Engineers, scientists, students, and anyone working with fluids in various fields such as civil engineering, oceanography, meteorology, and more can use this calculator to understand...

Fluid mechanics calculators

Editors’ Top PickBased on community votes

Omni Calculator

omnicalculator.com

Our hydrostatic pressure calculator is here to help you if you want to find the hydrostatic pressure at a certain depth.

Open Omni Calculator Read review →

Other OptionsRanked by votes

02
02
Kitset
kitset.app
Calculate hydrostatic gauge pressure, absolute pressure and force per square meter from fluid density, depth, gravity...
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Side by side

Hydrostatic Pressure Calculator options compared

Tool	Best for	Strengths	Limitations
Omni Calculator omnicalculator.com	Quick hydrostatic pressure estimates	Fluid presets for water, mercury, and other common liquids Simple depth input with immediate result display	No absolute pressure or force calculations Custom fluid density requires manual entry
Kitset kitset.app	Absolute pressure and force per area calculations	Calculates gauge pressure, absolute pressure, and force per square meter Includes surface pressure as an input parameter	No live page excerpt available No fluid presets; all densities must be entered manually

Buyer's guide

How to choose a hydrostatic pressure calculator

If you need the pressure at a specific depth in a common fluid like water or oil, Omni Calculator’s preset fluid list saves time and reduces entry errors. If your work involves absolute pressure (including atmospheric or surface pressure) or you need the total force on a specific area, Kitset provides those extra outputs but requires you to input all densities and pressures manually.

Questions

Hydrostatic Pressure Calculator FAQ

How do I calculate hydrostatic pressure at a given depth?: Enter the fluid density, the vertical depth below the surface, and the gravitational acceleration. The calculator multiplies density × depth × gravity to give the pressure.
What is the difference between gauge pressure and absolute pressure?: Gauge pressure measures pressure relative to atmospheric pressure, while absolute pressure includes the atmospheric pressure acting on the fluid surface.
Can I use this calculator for gases as well as liquids?: The tool is designed for homogeneous fluid columns; for most practical purposes it applies to liquids, but the same equation works for gases if you use the gas density at the given conditions.
What units should I use for depth and density?: Depth is typically entered in meters or feet, and density in kilograms per cubic meter or pounds per cubic foot; the calculator will convert accordingly to output pressure in pascals, atmospheres, or other common units.
Does the calculator account for surface pressure like wind or atmospheric pressure?: Omni Calculator does not include surface pressure by default; if you need to include atmospheric or additional surface pressure, use Kitset which has a dedicated input for that value.

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