Figure Gallons in a Tank Calculator

Volume Formulas:

\[ V_{gal} = \frac{L \times W \times H}{231} \text{ (rectangular)} \] \[ V_{gal} = \frac{\pi \times r^2 \times h}{231} \text{ (cylindrical)} \]

Tank Shape:

Length:

inches

Width:

inches

Height:

inches

Volume (gallons):

Definition: This calculator estimates the volume of liquid a tank can hold in gallons based on its dimensions and shape.

Purpose: It helps professionals and homeowners determine tank capacity for storage, industrial applications, or aquarium setups.

The calculator uses different formulas based on tank shape:

\[ V_{gal} = \frac{L \times W \times H}{231} \text{ (rectangular)} \] \[ V_{gal} = \frac{\pi \times r^2 \times h}{231} \text{ (cylindrical)} \]

Where:

Explanation: The calculator first computes cubic inches, then converts to gallons (1 gallon = 231 cubic inches).

Details: Accurate volume calculation ensures proper system design, chemical dosing, and storage capacity planning.

Tips: Select tank shape, enter dimensions in inches, and click Calculate. All values must be > 0.

Q1: Why divide by 231?
A: 231 cubic inches equals 1 US liquid gallon, the standard conversion factor.

Q2: Can I use feet instead of inches?
A: No, the calculator requires inches. Convert feet to inches (1 ft = 12 in) before entering.

Q3: What about irregular tank shapes?
A: This calculator handles only standard rectangular and cylindrical shapes.

Q4: Does this account for tank thickness?
A: No, measurements should be internal dimensions for capacity calculations.

Q5: How accurate is the calculation?
A: It's mathematically precise for perfect geometric shapes. Real-world tanks may vary slightly.