Calculate total spray water needed in gallons and liters, or find your sprayer’s actual GPA from nozzle flow, speed, and nozzle spacing.

Gallons Per Acre Calculator

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Gallons Per Acre Formula

The following formula is used to calculate the gallons per acre.

GPA = V / A

Variables:

  • GPA is the gallons per acre
  • V is the total volume of liquid (gallons)
  • A is the area (acres)

To calculate gallons per acre, divide the total volume of liquid by the area in acres.

What is Gallons Per Acre?

Gallons per acre (GPA) is a unit of measurement commonly used in agriculture and land management to determine the amount of liquid that is applied to an acre of land. This measurement is particularly important for the precise application of water, pesticides, herbicides, and fertilizers to ensure proper coverage without waste or environmental harm.

How to Calculate Gallons Per Acre?

The following steps outline how to calculate the Gallons Per Acre.


  1. First, determine the total volume of liquid (V) in gallons.
  2. Next, determine the area (A) in acres.
  3. Next, gather the formula from above = GPA = V / A.
  4. Finally, calculate the Gallons Per Acre (GPA).
  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 of liquid (V) = 500 gallons

area (A) = 2 acres