Enter the length, width, and depth of the pool into the calculator to determine the capacity.

Pool Water Capacity Formula

The following formula is used to calculate the capacity of a pool in gallons.

C = L * W * D * 7.5

Variables:

  • C is the capacity of the pool (gallons)
  • L is the length of the pool (feet)
  • W is the width of the pool (feet)
  • D is the depth of the pool (feet)

To calculate the capacity of a pool, multiply the length of the pool by the width and the depth. Then multiply the result by 7.5 (the number of gallons in one cubic foot of water). The result is the capacity of the pool in gallons.

What is a Pool Water Capacity?

Pool water capacity refers to the maximum amount of water that a swimming pool can hold. It is usually measured in gallons or liters. This capacity is determined by the dimensions of the pool, including its depth, length, and width. Knowing the water capacity of a pool is important for maintenance purposes such as adding the correct amount of chemicals to keep the water clean and safe for swimming.

How to Calculate Pool Water Capacity?

The following steps outline how to calculate the Pool Water Capacity.


  1. First, determine the length of the pool (L) in feet.
  2. Next, determine the width of the pool (W) in feet.
  3. Next, determine the depth of the pool (D) in feet.
  4. Multiply the length (L), width (W), depth (D), and 7.5 to calculate the pool water capacity (C).
  5. Finally, calculate the Pool Water Capacity.
  6. 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.

Length of the pool (L) = 20 feet

Width of the pool (W) = 10 feet

Depth of the pool (D) = 5 feet