The volume of a swimming pool depends on whether it's round or rectangular.
Round is pi x Rsquared x H - - 3.142 x radius squared x height -
If rectangular it's Width x Length x Height -
Those answers are in cubic feet (if you used foot measure) to convert those to gallons, multiply cu. ft. by 6.229 to get Imperial Gall. or by 7.48 to get USG.
-If it's a kidney shaped pool (as many are) -the mathematical combination for that is beyond my limited ability.
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