Contact BuildCalc

The fastest way to reach us is email. We read every message.

Email is our only contact channel — there is no phone number or postal address for this site. If you write to us, please include the page you were on (copy the address from your browser), what you entered into the calculator, and what you expected to see. That is usually enough for us to reproduce a problem and fix it.

What to write about

A wrong number: a coverage figure, bag yield or conversion you believe is incorrect, and the source you checked it against (for example, the label on the product you bought).
A missing calculator: a material or job you would like a calculator for.
A guide request: a job or material you would like explained in depth.
Anything else: a broken link, a page that does not work on your phone, or a suggestion for the site.

What we cannot do

We cannot give professional advice about your specific job — for example, whether a slab needs reinforcement, whether a wall is load-bearing, or what a contractor should charge in your area. Those questions need a qualified professional who can see the job. We also cannot quote prices: prices vary by store and region, so check with the store you will buy from. See our Disclaimer.

We aim to reply to every email, but we do not promise a reply time — BuildCalc is a small project, and corrections to the site come first.