Job Maths is run by Human Web Co (ABN 46 298 119 036), Melbourne, Australia.
Estimates only
The calculators give estimates of quantity from the numbers you enter. They are general information, not building, engineering or trade advice, and they do not take your site, your materials or your local rules into account.
Check before you order or build
Confirm quantities with your supplier and confirm sizes, spacings and anything structural with your plans, your council or a qualified person before you buy materials or start work.
Our responsibility
We take care to get the sums right, but we do not promise the site is free of errors. To the extent the law allows, we are not responsible for loss that comes from relying on a result. Nothing here takes away rights you have under the Australian Consumer Law.
Using the site
You are welcome to use the calculators for your own jobs and to link to any page. Please do not copy the site or its calculators onto another website. Tradespeople who want them on their own site can buy the kit.