Contact

Email is the fastest way to reach us: hello@estimatormath.com

There is no contact form on this site. The whole thing is static files with no server behind it, which is what makes the calculators fast and keeps your project data on your own machine — but it also means there is nothing to receive a form submission.

Reporting a wrong figure

These are the messages we most want to receive. If a coverage rate, bag yield or code limit looks wrong, please include:

• Which calculator, and which figure
• What you believe the correct value is
• Where your figure comes from — a data sheet, a code section, a supplier

Sourced corrections get applied quickly and the page's verification date is updated when they are. Getting a coverage rate wrong costs someone a second trip to the yard; getting a code limit wrong costs them an inspection.

Asking about a calculation

Every tool page writes out its formula, a worked example, its assumptions and an explicit list of what it does not account for — it is worth reading those first, because the answer to "why did it give me that number" is usually in the "show the arithmetic" panel under the results.

If it is not, send the dimensions you entered and what you expected. That is enough to reproduce it exactly.

Suggesting a new tool

Tell us the calculation and, ideally, where the published figures for it come from. The bar for adding a tool is that we can source every rate it needs and write out a worked example that a tradesperson would recognise as correct.

What we cannot help with

We cannot give project-specific engineering, construction or code advice. That includes sizing structural members, confirming whether a particular assembly meets code in your jurisdiction, or advising on work already underway. Those need a licensed professional who can see the actual building — and in most cases they need one anyway for the permit. Read the disclaimer.

Business enquiries

Advertising, partnerships and licensing enquiries go to the same address. We do not accept paid guest posts, sponsored links, or any arrangement that would put a commercial thumb on the scale of what a calculator tells you.