The image above represents the fluid potential.

To compute for the fluid potential, three essential parameters are needed and these parameters are **pressure (P), Datum Levels (ΔZ) **and **Density (ρ).**

The formula for calculating fluid potential:

φ = P – [^{ρ} / _{144}]ΔZ

Where;

φ = Fluid Potential

P = Pressure

ΔZ = Datum Levels

ρ = Density

Let’s solve an example;

Find the fluid potential when the pressure is 24 with a datum level of 18 and the density of 30.

This implies that;

P = Pressure = 24

ΔZ = Datum Levels = 18

ρ = Density = 30

φ = P – [^{ρ} / _{144}]ΔZ

φ = 24 – [^{30}/_{144}] 18

φ = 24 – [0.2083] 18

φ = 24 – 3.75

φ = 20.25

Therefore, the fluid potential is **20.25**.

**Calculating the Pressure(P) when the fluid potential, Datum levels and Density is Given.**

P = φ – [^{ρ} / _{144}]ΔZ

Where;

P = Pressure

φ = Fluid Potential

ΔZ = Datum Levels

ρ = Density

Lets solve an example;

Find the pressure with a fluid potential of 40 and a datum levels of 18 with density of 24.

This implies that;

φ = Fluid Potential = 40

ΔZ = Datum Levels = 18

ρ = Density = 24

P = φ – [^{ρ} / _{144}]ΔZ

P = 40 – [^{24} / _{144}]18

P = 40 – [0.167]18

P = 40 – 3

P = 37

Therefore, the **pressure** is **37.**