Enter the total head (ft) and the specific gravity into the calculator to determine the Pressure From Head.

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## Pressure From Head Formula

The following formula is used to calculate the Pressure From Head.

P = .433*H*SG

- Where P is the Pressure From Head (psi)
- H is the total head (ft)
- SG is the specific gravity

To calculate pressure from head, multiply the head by .433, then multiply again by the specific gravity.

## How to Calculate Pressure From Head?

The following two example problems outline how to calculate the Pressure From Head.

**Example Problem #1:**

- First, determine the total head (ft). In this example, the total head (ft) is given as 1235.
- Next, determine the specific gravity. For this problem, the specific gravity is given as 40.
- Finally, calculate the Pressure From Head using the equation above:

P = .433*H*SG

Inserting the values from above and solving the equation with the imputed values gives:

P = .433*1235*40 = 21390.2 (psi)

**Example Problem #2: **

Using the same process as above, first define the variables required by the formula. In this case, these values are:

total head (ft) = 55

specific gravity = 125

Entering these values yields:

P = .433*55*125 = 2976.875 (psi)