1. What is a Swimming Pool Volume Calculator?

Definition: This calculator estimates the water volume in gallons needed to fill a rectangular swimming pool based on its dimensions.

Purpose: It helps pool owners and professionals determine the correct amount of water for filling or treating pools.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{gal} \) — Volume of water (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 treatment, pump sizing, and heating efficiency.

4. Using the Calculator

Tips: Measure pool dimensions accurately. For variable depth pools, calculate average depth (shallow end + deep end ÷ 2).

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate average depth?
A: Add the shallow end and deep end depths, then divide by 2 (e.g., 3ft shallow + 6ft deep = 4.5ft average).

Q2: Does this work for irregular shaped pools?
A: This calculator is for rectangular pools. For irregular shapes, divide into rectangular sections and sum the volumes.

Q3: Why 7.48 gallons per cubic foot?
A: This is the standard conversion factor (1 cubic foot = 7.48052 US gallons).

Q4: How accurate is this calculation?
A: Very accurate for rectangular pools if dimensions are measured precisely. Account for any steps or benches separately.

Q5: What about water displacement from swimmers?
A: This calculates total capacity. For chemical treatment, use total volume as swimmers displace only small amounts.