Contact

The best way to reach us is by email: info@buildertally.com. One person reads it, so a reply may take a few days.

Reporting a wrong number

This is the message we most want to receive. If a result looks wrong, tell us which calculator, what you entered, what it returned and what you expected — and if you have a published source for the figure you expected, include it. We will check it against ours and correct the page if you are right.

Suggesting a calculator

We add calculators where we can source the underlying constants properly. If you tell us what you are trying to estimate and what you currently do by hand, that is usually enough for us to work out whether it can be done well.

Everything else

We do not accept guest posts, link exchanges or sponsored content, and we do not reply to those emails.