Get in touch
One inbox, read by the people who build the calculators. No ticket system, no chatbot, no form that quietly goes nowhere.
We read everything that arrives. Bug reports with inputs attached get answered fastest, usually the same day we can reproduce them.
What to send
A calculator gave a wrong answer
The fastest thing to send. Include the calculator URL, the exact inputs you used, the result you got, and what you expected instead — that is almost always enough to reproduce it without any back-and-forth.
Report a bugA fact or citation needs correcting
Rates change, sources move, and thresholds get revised. If a figure is out of date or a citation no longer resolves, tell us which page and what it should say — corrections are made on the page itself and the date is updated.
Send a correctionSomething else
A calculator you'd like built, a question about how a page's method works, or a republishing request. If you want to contribute writing rather than report something, the Write for us page has what to send.
Get in touch
Reporting a wrong result
Four things, and we can usually confirm it the same day:
- 01The calculator’s name or URL.
- 02The exact inputs you entered.
- 03The result it gave you.
- 04The result you expected, and why.
Start with one of these
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- Compound Interest CalculatorProject how a balance grows with compound interest and regular contributions. Set rate, term, and compounding frequency, and see APY versus APR.Open