Enter the total depth under the surface of water and select whether the water is fresh water or saltwater. The calculate will evaluate and display the water pressure.

## Water Pressure Formula

The following formula can be used to calculate the water pressure an object sees at a given depth.

P = p*g*h

- Where P is the water pressure
- p is the density of the fluid
- g is the acceleration due to gravity
- h is the depth of the object in water

For fresh water, the density is 997.0474 kg/m^3

For salt water, the density is 1023.6 kg/m^3

## FAQ

**What is water pressure?**

Water pressure, also known as hydro static pressure, is the pressure and object sees while submerged in water due to the weight of the water around it.

**Why is water pressure different for salt water and fresh water?**

The pressure is different because the salt water is more dense than fresh water and so weighs more per unit volume.

**What is the acceleration due to gravity?**

This is a constant 9.8 m/s^2 on Earth. This value would be different on other planets.

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