Enter the depth of the object and the density of the fluid into the calculator to determine the pressure at depth.

Pressure Depth Formula

The following formula is used to calculate the pressure at a certain depth.

P = d * p * g
  • Where P is the pressure (pascals)
  • d is the depth (m)
  • p is the density (kg/m^3)
  • g is the acceleration due to gravity (9.81 m/s^2)

To calculate pressure from depth, multiply the depth by the density and the acceleration due to gravity.

Pressure Depth Definition

A pressure depth is defined as the total pressure acting on an object that is submerged in a fluid at a certain depth. The pressure is caused by the force of gravity acting on the fluid.

What is the relationship between depth and pressure?

Pressure and depth are directly correlated. Pressure increases on an object as the depth of the object that is submerged in a liquid are increased. Inversely, the pressure decreases as depth decreases.

Can pressure decrease with depth?

Pressure could only decrease with depth if the liquid becomes less dense as the depth increases. In reality, this would not happen since a less dense liquid would rise to the top.

Does pressure increase linearly with depth?

Yes, pressure increases linearly with depth. This can be seen in the formula P = d * p * g. As depth increases, pressure increases at the same magnitude.

Why does pressure increase with depth?

Pressure increase with depth due to the force of gravity acting on the liquid. As an object is submerged deeper, the amount of water “on top” of the other liquid surrounding it increases. This means that the pressure the liquid acts on the object will also increase.

Pressure Depth Example

How to calculate pressure depth?

  1. First, determine the depth.

    Measure the total depth in meters.

  2. Next, determine the density.

    For water the density would be 997 kg/m^3.

  3. Finally, calculate the pressure.

    Calculate the pressure using the equation above along with the acceleration due to the gravity of 9.81 m/s^2.


What does the pressure at depth depend on?

The pressure at depth depends on the total depth and the density of the fluid.