Gallons Per Inch Calculation

Gallons Per Inch Formula:

\[ \text{Gallons per inch} = \frac{\pi \times r^2}{231} \]

Gallons per inch:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Gallons Per Inch Calculation?

The Gallons Per Inch calculation determines how many gallons of liquid a cylindrical container holds per inch of height. This is useful for tank calibration and liquid volume measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{Gallons per inch} = \frac{\pi \times r^2}{231} \]

Where:

\( r \) — Radius of the tank in inches
\( \pi \) — Approximately 3.14159
231 — Cubic inches per gallon (conversion factor)

Explanation: The formula calculates the cross-sectional area of the cylinder in square inches, then converts it to gallons per inch of height.

3. Importance of Gallons Per Inch Calculation

Details: This calculation is essential for tank calibration, fuel storage monitoring, and any application where you need to convert liquid height to volume in cylindrical containers.

4. Using the Calculator

Tips: Enter the radius of your cylindrical tank in inches. The radius is half of the diameter. Ensure the value is positive.

5. Frequently Asked Questions (FAQ)

Q1: Why is 231 used in the formula?
A: 231 cubic inches equals 1 US liquid gallon, which is the standard conversion factor.

Q2: Can this be used for non-cylindrical tanks?
A: No, this formula only works for perfect cylinders. Other shapes require different calculations.

Q3: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders. Real-world accuracy depends on how perfectly cylindrical your tank is.

Q4: Can I use this for metric measurements?
A: This calculator uses inches and US gallons. For metric, you would need to adjust the conversion factor.

Q5: What if my tank isn't vertical?
A: This calculation assumes a vertically oriented cylinder. Horizontal cylinders require more complex formulas.