1. What is a Pool Gallon Size Calculator?

Definition: This calculator estimates the volume of a swimming pool in gallons based on its dimensions.

Purpose: It helps pool owners and professionals determine the water capacity for proper chemical treatment, pump sizing, and maintenance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{gal} \) — Volume of pool (gallons)
• \( L \) — Length of pool (feet)
• \( W \) — Width of pool (feet)
• \( D_{avg} \) — Average depth of pool (feet)
• \( 7.48 \) — Conversion factor (gallons per cubic foot)

Explanation: The pool dimensions are multiplied together to get cubic feet, then converted to gallons.

3. Importance of Pool Volume Calculation

Details: Accurate volume calculation ensures proper chemical dosing, correct pump and filter sizing, and efficient water treatment.

4. Using the Calculator

Tips: Enter the pool length and width in feet. For average depth, calculate (shallow end depth + deep end depth) ÷ 2. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I measure average depth?
A: Measure depth at both shallow and deep ends, add them together, and divide by 2.

Q2: What if my pool isn't rectangular?
A: This calculator is for rectangular pools. Different formulas exist for oval, round, or freeform pools.

Q3: Why 7.48 as the conversion factor?
A: There are 7.48 gallons in one cubic foot of water.

Q4: Does this include the spa or attached features?
A: No, calculate these separately and add to the main pool volume.

Q5: How accurate is this calculation?
A: It provides a good estimate. For irregular shapes or exact measurements, consult a pool professional.