Contact CalcWorks

Questions, corrections and suggestions are welcome — especially corrections. If a calculator's result disagrees with a published reference, tell us which calculator and which source, and we will check it.

Before you write

• A result looks wrong: include the calculator name and the exact numbers you entered — most surprises turn out to be a units mix-up (inches vs feet), and we can usually pinpoint it immediately.
• Requesting a new calculator: tell us the material or task and how you would normally work it out by hand; reader requests drive the order we build in.
• Advertising and partnerships: use the same email with "Advertising" in the subject line.

We read everything and reply to most messages within a few business days. Please don't send project plans or personal documents — we can't review individual builds, and the calculators run entirely in your browser, so nothing you type into them ever reaches us anyway.