Home Back

How To Calculate Tank Gallons

Tank Volume Formula:

\[ Volume = \frac{Length \times Width \times Height}{231} \]

inches
inches
inches

Unit Converter ▲

Unit Converter ▼

From: To:

1. What Is Tank Volume Calculation?

The tank volume calculation determines how many gallons of liquid a rectangular tank can hold based on its dimensions. This is essential for storage capacity planning, chemical dosing, and industrial applications.

2. How Does The Calculator Work?

The calculator uses the tank volume formula:

\[ Volume = \frac{Length \times Width \times Height}{231} \]

Where:

Explanation: The formula calculates cubic inches first, then converts to gallons (since 1 gallon = 231 cubic inches).

3. Importance Of Tank Volume Calculation

Details: Accurate volume calculation is crucial for proper tank sizing, inventory management, process control, and regulatory compliance in industries like water treatment, chemical processing, and oil storage.

4. Using The Calculator

Tips: Measure the internal dimensions of your tank in inches. Enter all three dimensions (length, width, height) as positive numbers. The calculator will provide the volume in US gallons.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 231?
A: 231 cubic inches equals 1 US gallon, which is the standard conversion factor for volume calculations.

Q2: Does this work for cylindrical tanks?
A: No, this formula is for rectangular tanks only. Cylindrical tanks use π × radius² × height.

Q3: Should I measure inside or outside dimensions?
A: Always use inside dimensions (excluding tank wall thickness) for accurate volume calculations.

Q4: How accurate is this calculation?
A: It's mathematically precise for perfect rectangular shapes. Actual capacity may vary slightly due to tank fittings or irregularities.

Q5: Can I use this for other liquids?
A: Yes, the result is in standard gallons. For weight calculations, you'll need to know the liquid's specific gravity.

How To Calculate Tank Gallons© - All Rights Reserved 2025