Calculate Gallons in a Pipe

Pipe Volume Formula:

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

Pipe Volume (gallons):

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1. What is the 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 the 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 the pipe (inches)
\( L \) — Length of the 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 are essential for system design, chemical dosing, and flow rate calculations in plumbing and industrial applications.

4. Using the Calculator

Tips: Measure the inner radius (half of inner diameter) and length in inches. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 231 cubic inches per gallon?
A: This is the standard US gallon volume conversion (1 US gallon = 231 cubic inches).

Q2: Can I use diameter instead of radius?
A: Yes, but you'll need to divide diameter by 2 first (radius = diameter/2).

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

Q4: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders. Real-world pipes may vary slightly due to manufacturing tolerances.

Q5: Can I calculate for feet instead of inches?
A: Yes, but convert feet to inches first (1 foot = 12 inches) or adjust the formula's conversion factor.