1. What is a Pool Volume Calculator?

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

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{gal} \) — Volume in 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 formula calculates cubic feet of the pool then converts to gallons using the standard conversion factor.

3. Importance of Pool Volume Calculation

Details: Accurate volume measurement is crucial for proper chemical treatment, pump sizing, and heating efficiency.

4. Using the Calculator

Tips: Measure pool length and width at their longest points. For average depth, (shallow end depth + deep end depth) ÷ 2.

5. Frequently Asked Questions (FAQ)

Q1: What if my pool isn't rectangular?
A: This calculator is for rectangular pools. For circular pools, use π × radius² × depth × 7.48.

Q2: How accurate is the 7.48 conversion factor?
A: It's exact - 1 cubic foot = 7.48052 US gallons. We use 7.48 for simplicity.

Q3: Should I include the spa in calculations?
A: No, calculate spa volume separately as it often requires different chemical treatment.

Q4: What's a typical pool volume?
A: Average residential pools range from 10,000-30,000 gallons (e.g., 20×40×5 ft ≈ 15,000 gal).

Q5: Does this account for pool slopes?
A: Yes, by using average depth. For precise calculation, measure multiple depth points.