1. What is a Gallon 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 pipes for system design and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{gal/ft} \) — Volume per foot (gallons/foot)
• \( r \) — Inner radius of pipe (inches)
• \( \pi \) — Mathematical constant (~3.14159)
• 12 — Converts inches to feet
• 231 — Cubic inches per gallon (conversion factor)

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

3. Importance of Pipe Volume Calculation

Details: Accurate volume calculations are essential for system design, flow rate calculations, chemical dosing, and capacity planning.

4. Using the Calculator

Tips: Enter the pipe's inner radius in inches. The radius is half of the inner diameter. Value must be > 0.

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 significance of 231 in the formula?
A: 231 cubic inches equals 1 US liquid gallon, which is the standard conversion factor.

Q3: Does this work for any pipe material?
A: Yes, as long as you use the correct inner radius measurement, the material doesn't affect the volume calculation.

Q4: How do I calculate for multiple feet of pipe?
A: Multiply the result by the total length in feet. For example, 100 feet of pipe would be 100 × V_gal/ft.

Q5: What about pipes with different shapes?
A: This calculator is for circular pipes only. Other shapes require different formulas.