calcs.homes
calcs.homes
How many gallons is my pool? Work it out from a sloped shallow-to-deep end for an in-ground pool, or pick a standard above-ground pool size.
Estimate only — above-ground figures are manufacturer-published approximates.
For an in-ground pool with a sloped floor, we average the shallow-end and deep-end depths, multiply that by length and width to get cubic feet, then multiply by 7.5 — the standard gallons-per-cubic-foot figure for water — to get gallons. For above-ground pools, we skip the geometry and use the manufacturer's published capacity for the closest standard round or oval size.
Averaging the two end depths works because a sloped pool floor is essentially a wedge shape, so treating it as a rectangle at the mean depth gives the same volume as the actual sloped floor. Above-ground pools use published figures instead of a formula because their curved walls and bottom contours don't reduce cleanly to a box or cylinder, so manufacturers test and publish the real fill capacity for each size.
Switch to the "Above-ground (preset)" tab and pick the closest published size — most above-ground pools are sold in a handful of standard round and oval dimensions.
Measure straight down at the deepest point of the pool floor, typically near the diving area if there is one.
The pool gallons calculator takes a single average depth for a quick estimate across rectangle, round, oval, or kidney shapes. This tool works from your actual shallow and deep end measurements, or a standard above-ground pool size.