Contact Calcnaut

There is no contact form, ticket system or guaranteed response time. Use the address above for corrections, calculator requests, embedding questions, press enquiries or privacy questions.

Report an error in a formula or a result

Include which calculator you were using, the numbers you entered, the result you got and the result you expected, and the spec sheet or standard you are working from if you have one. Those details make the report reproducible and can support a correction and an automated case.

Request a calculator

If there is a calculation you keep doing by hand, describe the inputs you start from and the answer you need at the end. A worked example and a source for material figures make the request easier to assess.

Using or embedding the calculators

Every calculator is free to use and free to embed on your own site, and each one carries an embed snippet on its page. Write to us if you need a different size, want a calculator adapted for your audience, or are not sure whether your use is covered by the terms.

Press and citations

Journalists, teachers and writers are welcome to cite Calcnaut. Attribute it as Calcnaut (calcnaut.com) with a link to the calculator you used. Machine-readable specifications, with the formula, constants and sources for each calculator, are published at /api/calculators.json. For anything else, including how a particular figure was derived, email us.

Privacy questions

For access, deletion or objection requests, or any other question about data, write to the same address. What we do and do not collect is set out in the privacy policy.