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

Definition: This calculator determines how many gallons of water are contained in one linear foot of pipe based on the pipe's inner radius.

Purpose: It helps plumbers, engineers, and irrigation specialists calculate water volume in pipes for system design and capacity planning.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{gal/ft} \) — Volume in gallons per foot
• \( r \) — Inner radius of the pipe (inches)
• \( \pi \) — Mathematical constant (~3.14159)
• 12 — Converts to 1 foot length (from inches)
• 231 — Cubic inches per US gallon

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

3. Importance of Pipe Volume Calculation

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

4. Using the Calculator

Tips: Enter the pipe's inner radius in inches (not diameter). The radius must be > 0. Result shows gallons contained per linear foot of pipe.

5. Frequently Asked Questions (FAQ)

Q1: Why use radius instead of diameter?
A: The formula uses radius because the area calculation is πr². If you have diameter, divide by 2 to get radius.

Q2: 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.

Q3: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders. Real pipes may have minor manufacturing variations.

Q4: What about pipes with different lengths?
A: Multiply the result by the total pipe length in feet to get total gallons.

Q5: Can I use this for metric measurements?
A: No, this uses US customary units. For metric, you'd need different conversion factors.