General email

For everything that is not a legal request:

Use this address for content questions, calculator suggestions, methodology clarifications, and general feedback.

Content corrections

If you spot an error — a misquoted statistic, an out-of-date threshold, a broken methodology link, or a calculation that looks wrong — please email us with the page URL and a brief description. We log every substantive correction and update the page's "Last updated" stamp.

Email:

Advertising and partnerships

For advertising inquiries, sponsored-content proposals (we do not currently accept any), partnership opportunities, or press requests:

Email:

We do not sell links, accept payment to alter calculator results, or run sponsored clinical content. See our editorial policy for the full independence statement.

Privacy and data requests

For GDPR / CCPA data-subject requests (access, deletion, opt-out of sale or sharing), or any privacy-related question:

Email:

See our Privacy Policy for what data we collect (essentially: nothing you enter) and how to exercise your rights.

DMCA notices

For copyright claims under the Digital Millennium Copyright Act, send a written notice to:

Email:

Please include the URL of the allegedly infringing material, a description of the original work, your contact information, and a statement of good-faith belief that the use is not authorized.

Response time

We are a small team. Typical response windows:

Mailing address

We do not publish a street address publicly. For legal service, contact first; we will provide the registered address on request.