Pool Calculator

Find the water volume of a rectangular swimming pool in gallons.

Length

Width

Average depth

Water volume 19,150.13

Water volume 72,491.13

Volume 2,560

Formula: gallons = length × width × average depth × 7.48052

Step-by-step with your numbers:

1. Values used:

2. Length = 32

3. Width = 16

4. Average depth = 5

6. Water volume = 19,150.13

7. Water volume = 72,491.13

8. Volume = Length x Width x Average depth = 32 x 16 x 5 = 2,560

Did we solve your problem today?

Estimate how many gallons of water a rectangular pool holds — useful for dosing chemicals, sizing pumps and filling time.

The math behind it

Volume (ft³) = length × width × average depth.

One cubic foot of water = 7.48052 US gallons. For sloped floors, use the average of the shallow and deep ends.

32×16 ft pool, 5 ft average depth → 2,560 ft³ × 7.48052 = 19,150 gallons.

How do I find average depth?

Add the shallow-end and deep-end depths and divide by 2.