We read every message — corrections, suggestions, and questions are all welcome.
CalcHeadquarters is built and maintained by a small editorial team, and we genuinely value hearing from the people who use our tools. Whether you've found a calculation that looks off, have a calculator or guide you'd like us to build, or have a question about how we handle data, we want to know.
Email us at hello@calcheadquarters.com and we'll do our best to respond within a few business days.
Accuracy is the whole point of this site, so error reports get priority. If a result looks wrong, it helps us a lot if you include the calculator's URL, the values you entered, and the result you expected. We re-check the math and correct verified issues promptly. Our verification process is described in our editorial policy.
Is there a number you wish you could calculate but can't find a good tool for? Tell us — many of the calculators and guides on the site started as a reader request.
For privacy requests or questions about our terms and privacy policy, use the same email address and we'll route your message appropriately.