Physics

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Hydraulic Pressure Calculator.

Calculate pressure at depth in a fluid column.

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Set your values

Results update as you type.

02 / ANSWER

Fluid density

Depth

Gravity

Pressure

0.000000

Educational SI models with assumptions stated in each description; verify engineering decisions independently.

Use Cases

Engineering and Design

Determine pressure at depth for designing submerged structures, pipelines, or storage tanks.

Example: Calculate pressure at 10 m depth in water (density 1000 kg/m³, gravity 9.81 m/s²).

Education and Learning

Help students understand fluid pressure concepts and verify textbook problems.

Example: Check pressure at 5 m depth in oil (density 800 kg/m³).

Frequently Asked Questions

What does the hydraulic pressure calculator do?: It calculates the pressure exerted by a fluid at a given depth, using the formula P = ρgh, where ρ is fluid density, g is gravity, and h is depth.
What units should I use for density, depth, and gravity?: Enter fluid density in kg/m³, depth in meters, and gravity in m/s². The calculator will output pressure in pascals (Pa).
Can I use this calculator for any fluid?: Yes, as long as you know the fluid's density. For example, water has a density of about 1000 kg/m³, but you can adjust for other fluids.

Tips & Common Mistakes

Tips

Use standard gravity (9.81 m/s²) for Earth unless you're working with other planets or custom conditions.
Ensure density is in kg/m³; for water, use 1000 kg/m³, for seawater about 1025 kg/m³.
Depth should be measured from the surface of the fluid to the point of interest, not from the bottom.
Remember that this calculator gives gauge pressure (excluding atmospheric pressure) unless you add atmospheric pressure separately.

Common Mistakes to Avoid

Using density in g/cm³ instead of kg/m³ – convert by multiplying by 1000.
Forgetting to convert depth from cm or feet to meters – always use meters.
Assuming the pressure is absolute; this calculator provides pressure due to fluid column only, not including atmospheric pressure.

Last updated: August 13, 2026

Use Cases

Engineering and Design

Determine pressure at depth for designing submerged structures, pipelines, or storage tanks.

Example: Calculate pressure at 10 m depth in water (density 1000 kg/m³, gravity 9.81 m/s²).

Education and Learning

Help students understand fluid pressure concepts and verify textbook problems.

Example: Check pressure at 5 m depth in oil (density 800 kg/m³).

Frequently Asked Questions

What does the hydraulic pressure calculator do?

It calculates the pressure exerted by a fluid at a given depth, using the formula P = ρgh, where ρ is fluid density, g is gravity, and h is depth.

What units should I use for density, depth, and gravity?

Enter fluid density in kg/m³, depth in meters, and gravity in m/s². The calculator will output pressure in pascals (Pa).

Can I use this calculator for any fluid?

Yes, as long as you know the fluid's density. For example, water has a density of about 1000 kg/m³, but you can adjust for other fluids.

Tips & Common Mistakes

Tips

Use standard gravity (9.81 m/s²) for Earth unless you're working with other planets or custom conditions.
Ensure density is in kg/m³; for water, use 1000 kg/m³, for seawater about 1025 kg/m³.
Depth should be measured from the surface of the fluid to the point of interest, not from the bottom.
Remember that this calculator gives gauge pressure (excluding atmospheric pressure) unless you add atmospheric pressure separately.

Common Mistakes to Avoid

Using density in g/cm³ instead of kg/m³ – convert by multiplying by 1000.
Forgetting to convert depth from cm or feet to meters – always use meters.
Assuming the pressure is absolute; this calculator provides pressure due to fluid column only, not including atmospheric pressure.

Use Cases

Engineering and Design

Determine pressure at depth for designing submerged structures, pipelines, or storage tanks.

Example: Calculate pressure at 10 m depth in water (density 1000 kg/m³, gravity 9.81 m/s²).

Education and Learning

Help students understand fluid pressure concepts and verify textbook problems.

Example: Check pressure at 5 m depth in oil (density 800 kg/m³).

Frequently Asked Questions

What does the hydraulic pressure calculator do?

It calculates the pressure exerted by a fluid at a given depth, using the formula P = ρgh, where ρ is fluid density, g is gravity, and h is depth.

What units should I use for density, depth, and gravity?

Enter fluid density in kg/m³, depth in meters, and gravity in m/s². The calculator will output pressure in pascals (Pa).

Can I use this calculator for any fluid?

Yes, as long as you know the fluid's density. For example, water has a density of about 1000 kg/m³, but you can adjust for other fluids.

Tips & Common Mistakes

Tips

Use standard gravity (9.81 m/s²) for Earth unless you're working with other planets or custom conditions.
Ensure density is in kg/m³; for water, use 1000 kg/m³, for seawater about 1025 kg/m³.
Depth should be measured from the surface of the fluid to the point of interest, not from the bottom.
Remember that this calculator gives gauge pressure (excluding atmospheric pressure) unless you add atmospheric pressure separately.

Common Mistakes to Avoid

Using density in g/cm³ instead of kg/m³ – convert by multiplying by 1000.
Forgetting to convert depth from cm or feet to meters – always use meters.
Assuming the pressure is absolute; this calculator provides pressure due to fluid column only, not including atmospheric pressure.