Pool Volume Formula:
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The rectangular pool volume formula calculates the total gallons of water needed to fill a pool by multiplying length × width × average depth × 7.48 (the number of gallons in a cubic foot).
The calculator uses the pool volume formula:
Where:
Explanation: The formula calculates the cubic volume of the pool and converts it to gallons using the standard conversion factor.
Details: Knowing your pool's volume is essential for proper chemical treatment, pump sizing, heating calculations, and general maintenance.
Tips: Measure length and width at their longest points. For depth, average the shallow and deep end measurements if your pool has a slope.
Q1: How accurate does my measurement need to be?
A: For chemical dosing, measurements should be within ±10% of actual. For construction, more precise measurements are needed.
Q2: What if my pool isn't perfectly rectangular?
A: This calculator works best for true rectangles. For other shapes, use specialized formulas or divide into rectangular sections.
Q3: Why use 7.48 as the conversion factor?
A: 7.48052 gallons equals 1 cubic foot of water at standard temperature and pressure.
Q4: How do I calculate for a pool with variable depth?
A: Average the shallow end and deep end depths (shallow depth + deep depth)/2.
Q5: Can I use this for metric measurements?
A: No, this calculator uses feet and gallons. For metric, use meters and multiply by 1000 for liters.