1. What is the Pool Gallon Formula?

The pool gallon formula calculates the volume of water in a cylindrical pool using the radius and height measurements. It provides an estimate of how many gallons of water the pool can hold.

2. How Does the Calculator Work?

The calculator uses the cylindrical volume formula:

Where:

• \( r \) — Radius of the pool in inches
• \( h \) — Height (depth) of the pool in inches
• 231 — Cubic inches per US gallon conversion factor

Explanation: The formula calculates the cylindrical volume in cubic inches and converts it to US gallons.

3. Importance of Pool Volume Calculation

Details: Knowing your pool's volume is essential for proper chemical treatment, pump sizing, and maintenance planning.

4. Using the Calculator

Tips: Measure the radius (half of diameter) and average depth of your pool in inches. For irregular shapes, use average measurements.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation for non-cylindrical pools?
A: This provides an approximation. For rectangular pools, use length × width × height × 7.48 (for feet measurements).

Q2: Why use 231 in the formula?
A: 231 cubic inches equals 1 US gallon, which is the standard conversion factor.

Q3: Should I measure in feet or inches?
A: This calculator uses inches. For feet measurements, use (π × r² × h × 7.48) where 7.48 is gallons per cubic foot.

Q4: How do I measure an oval pool?
A: For oval pools, calculate as a circle using the average of length and width as diameter, then halve for radius.

Q5: What about pools with sloping bottoms?
A: Use the average depth (shallow end + deep end divided by 2) for best approximation.