Enter the initial psi, the final psi , and the initial volume (ft^3) into the Volume from PSI Calculator. The calculator will evaluate and display the Volume from PSI.

## Volume from PSI Formula

The following formula is used to calculate the Volume from PSI.

V = P1 * V1 / P2
• Where V is the Volume from PSI (ft^3)
• P1 is the initial psi
• P2 is the final psi
• V1 is the initial volume (ft^3)

To calculate volume from psi, multiply the initial pressure by the initial volume, then divide by the final pressure.

## How to Calculate Volume from PSI?

The following example problems outline how to calculate Volume from PSI.

Example Problem #1

1. First, determine the initial psi.
1. The initial psi is given as 4.
2. Next, determine the final psi .
1. The final psi  is calculated as: 2.
3. Next, determine the initial volume (ft^3).
1. The initial volume (ft^3) is found to be: 10.
4. Finally, calculate the Volume from PSI using the formula above:

V = P1 * V1 / P2

Inserting the values from above yields:

V = 4 * 10 / 2 = 20 (ft^3)

Example Problem #2

The variables needed for this problem are provided below:

initial psi = 7

final psi  = 6

initial volume (ft^3) = 10

Entering these values and solving gives:

V = 7 * 10/ 6 = 11.66 (ft^3)