1. What is a Gallons in Pipe 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, irrigation, or other liquid-handling applications.

2. How Does the Calculator Work?

The calculator uses the formula:

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 then converts to gallons.

3. Importance of Pipe Volume Calculation

Details: Accurate volume calculations ensure proper system design, flow rate planning, and chemical dosing in piping systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 231?
A: There are 231 cubic inches in one US liquid gallon, which is the standard conversion factor.

Q2: What if I know diameter instead of radius?
A: Simply divide the inner diameter by 2 to get the radius before entering.

Q3: Does this work for any pipe 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, but real pipes may have minor variations.

Q5: Can I use this for metric measurements?
A: No, this calculator uses inches for radius/length and outputs US gallons. Convert metric units first if needed.