Gallons per Square Foot Calculator
Calculate liquid coverage, pool volume, tank capacity, and construction applications. Get area, volume, and gallons per square foot with step-by-step calculations.
Dimensions
Enter length, width, and height in feet to calculate gallons per square foot
Results
Enter dimensions to see live results and step-by-step calculations.
Understanding Gallons per Square Foot
Formulas Used
A = L × W (Area in square feet)
Vft³ = A × H = (L × W) × H (Volume in cubic feet)
Vgal = Vft³ × 7.48052 (Volume in US gallons)
G = Vgal ÷ A (Gallons per square foot)
Common Applications
- Pool & Spa: Calculate water volume and chemical dosing rates
- Tank Design: Determine liquid storage capacity per floor area
- Irrigation: Calculate water application rates for landscaping
- Construction: Estimate concrete, paint, or coating coverage
- Aquaculture: Design fish tanks and water systems
Conversion Factor
1 cubic foot = 7.48052 US gallons
This conversion factor is exact and widely used in construction, plumbing, and engineering applications.
Example Calculation
Given: Length = 10 ft, Width = 8 ft, Height = 3 ft
Solution:
Area = 10 × 8 = 80 ft²
Volume = 80 × 3 = 240 ft³
Volume in gallons = 240 × 7.48052 = 1,795.32 gallons
Gallons per sq ft = 1,795.32 ÷ 80 = 22.44 gal/ft²