Pool Volume Calculator

Pool gallons = L × W × avg-depth × 7.48.

Inputs

(shallow + deep) / 2.

Result

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How to use this calculator

  • Enter pool dimensions and average depth.
  • Pick shape (rectangular/oval/kidney).

About this calculator

Pool volume in gallons drives chemical dosing (chlorine, pH adjusters), pump-cycle calculation, and heater sizing. Average depth is (shallow + deep) / 2 — a rough approximation for most residential pools.

Frequently asked

How to compute average depth?+
(shallow-end depth + deep-end depth) / 2. For a constant-depth pool, just use that depth.
Why 7.48 gallons per ft³?+
US gallon: 231 in³. ft³ = 1728 in³. 1728/231 = 7.48052.
Liters?+
1 US gal = 3.78541 L. Or compute m³ × 1000.
Affects chlorine dose?+
Yes — pool chemicals are sold per 10,000 gallons. Check the bottle's instructions.
Irregular shapes?+
Use the kidney approximation (~85% of bounding rectangle), or split into rectangles for precision.

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