Contact and Calculation Feedback

Get in touch

We welcome corrections, suggestions for new calculators and reports of anything that looks wrong. Contact: the feedback form on the Contact page.

For a calculation question, include the calculator address, the values you entered, the result you expected and any official method reference. For accessibility issues, include your browser and assistive technology. Please avoid sending private medical, financial or account information.

Prepare a feedback report

Use the form below to prepare a report you can download and send to us. It is generated in your browser and is not sent automatically.

What happens next

We read reports, reproduce the issue where we can and update the page when a correction is confirmed. We cannot give personal financial, medical or legal advice by email.