Home Back

How To Calculate Water Tank Capacity In Gallons Formula

Water Tank Capacity Formula:

\[ Volume (gal) = L (ft) \times W (ft) \times H (ft) \times 7.48 \]

ft
ft
ft

Unit Converter ▲

Unit Converter ▼

From: To:

1. What Is The Water Tank Capacity Formula?

The water tank capacity formula calculates the volume of water a tank can hold in gallons based on its dimensions in feet. The formula accounts for the conversion from cubic feet to gallons using the conversion factor 7.48 (since 1 cubic foot = 7.48 US gallons).

2. How Does The Calculator Work?

The calculator uses the water tank capacity formula:

\[ Volume (gal) = L (ft) \times W (ft) \times H (ft) \times 7.48 \]

Where:

Explanation: The formula calculates the volume in cubic feet first, then converts it to gallons using the standard conversion factor.

3. Importance Of Water Tank Capacity Calculation

Details: Accurate water tank capacity calculation is essential for proper water storage planning, system design, and ensuring adequate water supply for residential, commercial, and industrial applications.

4. Using The Calculator

Tips: Enter the length, width, and height of the tank in feet. All values must be positive numbers. The calculator will compute the volume in US gallons.

5. Frequently Asked Questions (FAQ)

Q1: Why use 7.48 as the conversion factor?
A: 7.48 is the standard conversion factor from cubic feet to US gallons, as 1 cubic foot equals approximately 7.48 US gallons.

Q2: Can this formula be used for irregularly shaped tanks?
A: No, this formula is specifically for rectangular tanks. Different formulas are needed for cylindrical, spherical, or irregularly shaped tanks.

Q3: How accurate is this calculation?
A: The calculation is mathematically accurate for perfect rectangular tanks. Actual capacity may vary slightly due to tank construction and internal components.

Q4: What if my measurements are in inches or meters?
A: Convert all measurements to feet before using the calculator. For inches, divide by 12; for meters, multiply by 3.28084.

Q5: Does this account for tank wall thickness?
A: No, this calculation uses internal dimensions. For precise capacity, measure the internal length, width, and height.

How To Calculate Water Tank Capacity In Gallons Formula© - All Rights Reserved 2025