Gallons in a Pipe Calculator

Pipe Volume Formula:

\[ V_{gal} = \frac{\pi \times r^2 \times L}{231} \]

Pipe Volume (gallons):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is a Gallons in a Pipe Calculator?

Definition: This calculator estimates the volume of liquid a pipe can hold in gallons based on its inner radius and length.

Purpose: It helps plumbers, engineers, and DIYers determine pipe capacity for fluid transport, storage, or system design.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V_{gal} = \frac{\pi \times r^2 \times L}{231} \]

Where:

\( V_{gal} \) — Volume in gallons
\( r \) — Inner radius of pipe (inches)
\( L \) — Length of pipe (inches)
231 — Conversion factor (cubic inches per gallon)

Explanation: The formula calculates the cylindrical volume in cubic inches and converts it to gallons.

3. Importance of Pipe Volume Calculation

Details: Accurate volume calculations ensure proper system design, flow rates, and material requirements for plumbing and industrial applications.

4. Using the Calculator

Tips: Enter the inner radius and length in inches. Both values must be > 0. The result shows the pipe's liquid capacity in gallons.

5. Frequently Asked Questions (FAQ)

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

Q2: Does this work for any pipe shape?
A: No, this formula is specifically for cylindrical pipes. Other shapes require different formulas.

Q3: Should I use inner or outer radius?
A: Always use the inner radius to calculate the actual liquid capacity.

Q4: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders with uniform dimensions.

Q5: Can I use feet instead of inches?
A: Convert feet to inches (1 foot = 12 inches) for accurate results with this formula.