Volume of Pipe Calculator 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?

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, heating systems, or irrigation projects.

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 rate estimation, and chemical dosing in plumbing and industrial applications.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why use radius instead of diameter?
A: The formula requires radius (r²), but you can measure diameter and divide by 2.

Q2: What if my pipe is in feet?
A: Convert feet to inches (1 foot = 12 inches) before entering values.

Q3: Does this work for non-circular pipes?
A: No, this formula is for circular pipes only. Rectangular pipes require different formulas.

Q4: Why 231 cubic inches per gallon?
A: This is the standard US gallon volume conversion (231 in³ = 1 US liquid gallon).

Q5: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders. Real pipes may vary slightly due to manufacturing tolerances.