Guides

Practical, worked-example articles that sit behind the calculator: how to measure, which formula to use, how units convert, and how volume feeds into weekly care.

Homeowner measuring the length of a rectangular backyard swimming pool with a tape measure

How to Measure Your Swimming Pool

Measure length, width, diameter and average depth accurately, including sloped floors, steps and freeform outlines.

Overhead view of a geometric rectangular swimming pool used to illustrate volume formulas

Pool Volume Formulas (With Examples)

The exact formulas this calculator uses for rectangular, circular, oval and irregular swimming pools, with worked examples.

Clear water pouring from a glass measuring jug into a swimming pool

Litres to Gallons Conversion

Convert pool volume between litres, cubic metres, US gallons and imperial gallons using the official litre definitions.

Well-maintained backyard swimming pool with a skimmer net and chemical floater on the water

Pool Maintenance Basics

How pool volume drives sanitiser dosing, filter runtime and water testing — a practical maintenance primer.