Enter the total volume (gallons) and the total area (in^2) into the Calculator. The calculator will evaluate the Gallons Per Square Inch. 

Gallons Per Square Inch Formula

GSI = G / A


  • GSI is the Gallons Per Square Inch (gallons/in^2)
  • G is the total volume (gallons)
  • A is the total area (in^2)

To calculate Gallons Per Square Inch, divide the volume in gallons by the area in square inches.

How to Calculate Gallons Per Square Inch?

The following steps outline how to calculate the Gallons Per Square Inch.

  1. First, determine the total volume (gallons). 
  2. Next, determine the total area (in^2). 
  3. Next, gather the formula from above = GSI = G / A.
  4. Finally, calculate the Gallons Per Square Inch.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total volume (gallons) = 8000

total area (in^2) = 2000