Contact

One address, read by the people who maintain the calculators:

hello@concretemixcalc.com

What to write about

• Corrections. A number that doesn't match your supplier, scale or code book — include the calculation and we'll fix or explain it. Factual corrections are the fastest-turning item here.
• Calculator requests. A project shape we don't cover yet (stairs, columns, domes…). Requests with real dimensions attached get priority.
• Everything else — typos, broken links, guide topics worth covering.

What we can't answer

We can't review your specific project for structural safety or code compliance — that's a licensed engineer or your local building department, and they're the right call anyway. The terms spell out the scope: these calculators plan pours, they don't stamp drawings.

We read everything and reply to most mail within a few days. No newsletters, no drip campaigns — an email here gets you an answer, not a subscription.