Contact
BuildCalc is a small, independently run reference site. There is no support desk and no sales team — email reaches the person who builds the calculators.
Typical reply time is two to three business days. Writing in English gets the fastest answer, but short questions in any language will be read.
What is worth writing about
- A number that looks wrong. Send the page address, the values you entered, and the result you expected. Quantity bugs get fixed first, because a wrong number costs someone money at the supplier counter.
- A calculator that does not exist yet. Describe the material, the unit you buy it in, and the situation you are pricing. Requests that come up repeatedly get built.
- A regional price correction. Budget bands are North American retail estimates. If your market is materially different, say where you are and what you paid.
- Licensing or reuse. Ask before republishing calculator output at scale.
What we cannot do
We do not quote jobs, estimate labour, review contractor bids, or advise on structural, electrical, or gas work. Quantities here are planning figures; a licensed contractor or engineer has to sign off on anything load-bearing or code-regulated. If your question is "is this safe", the answer is not on this website.
Corrections
Every page shows the date it was last reviewed. If a formula, waste allowance, or package size is out of date, tell us and the page will be corrected and re-dated.
Last updated: 9 November 2026