Contact

How to reach us

We are currently setting up a public contact address and will publish it on this page as soon as it is live. Until then this page exists so you know where to look — please check back shortly.

What's most useful to send

When the address is live, these are the reports that help us most:

• Incorrect results. Our top priority. Include the tool name, the exact values you entered, the result you got, and the result you expected.
• Bugs. Let us know which browser and device you were using, and what you did just before it broke.
• New tool requests. Tell us what you were trying to do — the underlying task is often more useful to us than a proposed feature.
• Accessibility problems. If something is unusable with a keyboard or a screen reader, we want to fix it.

What we can't help with

We can't recover data you entered into a tool. Because everything runs locally in your browser and nothing is uploaded, we have no copy of it — see our Privacy Policy for details.

We also can't give financial, legal, tax, or medical advice based on a calculator's output.

Privacy and legal

For data protection questions see the Privacy Policy. For the terms that govern use of this site see the Terms of Use.