Gallons per Foot of Pipe Calculator

Volume Formula:

\[ V_{gal/ft} = \frac{\pi \times r^2 \times 12}{231} \]

Volume:

gallons per foot

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1. What is a Gallons per Foot of Pipe Calculator?

Definition: This calculator determines the volume of liquid a pipe can hold per linear foot, measured in gallons.

Purpose: It helps plumbers, engineers, and irrigation specialists calculate fluid capacity in piping systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V_{gal/ft} = \frac{\pi \times r^2 \times 12}{231} \]

Where:

\( V_{gal/ft} \) — Volume in gallons per foot
\( r \) — Inner radius of pipe (inches)
\( 12 \) — Length conversion (inches to feet)
\( 231 \) — Cubic inches to gallons conversion

Explanation: Calculates the cylindrical volume of 1 foot of pipe and converts from cubic inches to gallons.

3. Importance of Pipe Volume Calculation

Details: Essential for system design, chemical dosing, flow rate calculations, and capacity planning in plumbing and industrial applications.

4. Using the Calculator

Tips: Enter the pipe's inner radius in inches. The result shows how many gallons of liquid one foot of pipe can hold.

5. Frequently Asked Questions (FAQ)

Q1: Why use radius instead of diameter?
A: The formula uses radius because the area calculation is πr². You can convert diameter to radius by dividing by 2.

Q2: What's the 231 conversion factor?
A: There are 231 cubic inches in a US liquid gallon (standard conversion).

Q3: Does this work for any pipe material?
A: Yes, as long as you use the actual inner radius of the pipe.

Q4: How do I calculate for multiple feet?
A: Multiply the result by the total length in feet.

Q5: What about metric units?
A: For metric, use liters per meter: V = π × r² × 1000 (r in cm).