Pipe Volume Calculator in Gallons

Pipe Volume Formula:

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

Pipe Volume (gallons):

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1. What is a Pipe Volume Calculator in Gallons?

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

Purpose: It helps plumbers, engineers, and DIYers determine the liquid capacity of pipes for various applications.

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 to gallons)

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

3. Importance of Pipe Volume Calculation

Details: Accurate volume calculations are essential for system design, chemical dosing, and capacity planning in plumbing and industrial applications.

4. Using the Calculator

Tips: Measure the inner diameter (divide by 2 for radius) and length in inches. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 231 cubic inches per gallon?
A: This is the standard US conversion factor based on the US liquid gallon definition.

Q2: Can I use diameter instead of radius?
A: Yes, just divide diameter by 2 before entering. The formula uses radius squared.

Q3: Does this work for pipes of any shape?
A: No, this formula is for circular pipes only. Other shapes require different formulas.

Q4: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders. Real pipes may have minor variations.

Q5: Can I calculate for feet instead of inches?
A: Convert feet to inches (×12) first, or adjust the formula to use 0.0408 instead of 231.