Pipe Volume Gallons per Foot

Pipe Volume Formula:

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

Volume (gallons per foot):

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.

The calculator uses the formula:

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

Where:

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

Details: Knowing gallons per foot helps in system design, chemical dosing, flow rate calculations, and capacity planning.

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

Q1: Why calculate per foot instead of total length?
A: Per-foot calculation allows easy scaling for any pipe length by simple multiplication.

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

Q3: Does this account for pipe thickness?
A: No, use inner radius only. Wall thickness affects outer diameter only.

Q4: Why 231 in the formula?
A: 231 cubic inches = 1 US liquid gallon (standard conversion).

Q5: How accurate is this calculation?
A: It's mathematically precise for perfect cylinders. Real pipes may vary slightly.