Overview
Fluid pressure matters in tank and pipe design and in diving. Enter the liquid density and depth to get hydrostatic pressure in several units.
Formula
Hydrostatic pressure = density × gravitational acceleration × depth. In fresh water at 10 meters, pressure is about 98.07 kPa.
How it works
Enter density
Use the liquid density in kg/m³.
Enter depth
Type the distance from the liquid surface to the point.
Read pressure
Results appear in pascals, bar, atmospheres and PSI.
Worked examples
Water at 10 meters
At 1,000 kg/m³ and 10 m depth, pressure is about 98,066.5 Pa = 0.980665 bar.
Seawater at 20 meters
At 1,025 kg/m³, pressure is about 201,036 Pa.
Frequently asked questions
Is this absolute or gauge pressure?
The result is gauge hydrostatic pressure from the liquid column. Add atmospheric pressure for absolute pressure.
Why does pressure increase with depth?
The weight of the liquid column above the point increases, and pressure is force per unit area.
Does liquid density matter?
Yes. Denser liquids produce greater pressure at the same depth.
This calculator is for educational and informational purposes only and is not a substitute for professional advice.