Pool Volume
Work out how many gallons your pool holds and its surface area — for round/above-ground, oval, rectangular and kidney/freeform shapes. These volume figures feed every salt, chemistry and heating calculation.
Pool VolumeCalculate your swimming pool volume in gallons from its shape, length, width and depths. Rectangular, round, oval and kidney pools supported.Round / Above-GroundCalculate the volume of a round or above-ground pool in gallons from its diameter and water depth. Fast, accurate gallons for 15, 18, 24 and 27 ft round pools.OvalCalculate an oval pool volume in gallons from its length, width and shallow and deep-end depths. Accurate gallons for oval above-ground and semi-inground pools.RectangularCalculate a rectangular pool volume in gallons from its length, width and shallow and deep-end depths. The go-to gallons calculator for in-ground pools.Kidney / FreeformEstimate a kidney or freeform pool volume in gallons from its two widths, length and depths. A practical rule-of-thumb gallons estimate for curved pools.Surface AreaCalculate your pool surface area in square feet from its shape and dimensions. The key input for sizing pool covers, solar collectors and heater surface losses.
Every Pool Volume tool is calculated server-side — visible immediately — with its formula, a worked example and a reference table. Background reading is in the guides.