Estimate rectangular pool water volume in gallons from length, width and average depth.
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A 30×15-foot pool averaging 5 feet deep holds about 16,831 gallons.
Estimate rectangular pool water volume in gallons from length, width and average depth. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
A rectangular 30-by-15-foot pool averaging 5 feet deep holds about 16,830 U.S. gallons.
Use average water depth rather than the deepest point if the pool floor slopes.
Steps, benches, irregular geometry and actual waterline reduce or change usable volume.
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Estimate rectangular pool water volume in gallons from length, width and average depth.
Volume in cubic feet = length × width × average depth. US gallons ≈ cubic feet × 7.48052.
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