Gallons Per Square Foot Calculator

What is a Gallons Per Square Foot Calculator?

A gallons per square foot calculator converts a base area and height into gallons of liquid per square foot. This is essential for sizing swimming pools, aquariums, water tanks, and ponds. The result depends on the container height: deeper water means more gallons per square foot of base area.

How to Use This Calculator

1. Enter the base area in square feet.
2. Enter the water height or depth.
3. Select the height unit (inches, feet, centimeters, or meters).
4. Read gallons per square foot and total gallon volume instantly.

Formula

Gallons per square foot depends on height in feet:

$$\text{gal/ft}^2 = H_{\text{ft}} \times 7.48052$$

Total volume in gallons:

$$\text{Volume (gal)} = \text{Area (sq ft)} \times H_{\text{ft}} \times 7.48052$$

The constant 7.48052 converts one cubic foot of water to US gallons. For pool planning, also try the Pool Water Maintenance Calculator, Gallons Per Minute Calculator, and Square Footage Calculator.