Measure · calculate · understand

Practical guides

Original explanations, clear examples and the assumptions that change your answer.

Use inside dimensions and actual water depth, with an example showing why wall height can overstate pool volume.

Calculate a uniformly sloped rectangle, then compare it with a segmented floor where a simple endpoint average overstates water.

Choose the correct curved pool outline and compare worked ellipse and semicircular-end volume estimates.

Convert pool capacity consistently and see why an unlabeled gallon value can cause a large mismatch.

Use either shallow-water zones or known solid displacement to account for ledges without subtracting the same space twice.

Understand measurement sensitivity, compare low and high scenarios, and improve the inputs that matter most.