Contact Us

Found a bug? Think a result looks off? Want a calculator we don't have yet? We'd genuinely like to hear about it — reader feedback is how this site gets better.

Email us at

contact@jsonbug.com

We typically reply within 2–3 business days.

When you write in, it helps to include:

Which calculator you were using (a link is perfect)
The inputs you entered and the result you expected
Your device and browser, if you're reporting a bug

Please note: we can't provide personalized financial, legal, or medical advice by email. For decisions specific to your situation, consult a qualified professional.