About

HomeMathCalc Australia is a small collection of free calculators for Australian homes, money and motoring. We built it because most calculators online are slow, cluttered, or hide the maths. Ours load instantly, work on any phone, and always show the formula.

How the calculators work

Every result is calculated in your browser using standard construction formulas and typical product sizes (for example, a 20 kg bag of concrete mix yields about 9 to 10 litres), and tax calculators use the current ATO and state revenue office rates. Nothing you type is sent to a server.

Accuracy

Results are estimates. Real quantities depend on the exact product, compaction, surface level and how carefully material is placed. For large orders, confirm with your supplier or contractor before you buy.

Who is behind it

HomeMathCalc is a small independent project that builds simple, useful web tools.

Questions or suggestions for a new calculator? Visit the contact page.