Contact
Questions, bug reports, suggestions and corrections are all welcome. Send us a message with the form below, and we'll reply by email as soon as we can.
What helps us help you
- For a bug: what you typed or tapped, what you expected, and what you saw instead. Your device and browser (for example, "iPhone, Safari" or "Windows, Chrome") help too. If a screenshot would help, say so, and we'll reply with a way to send it.
- For a wrong result: the full calculation, and the number format you're using if you've changed it.
- For a Solver idea: the question you'd like it to answer, and an example with real numbers.
- For a correction to the Guide: the page address and the sentence that's wrong.
Before you write
The answer may already be in the Guide, which covers every feature of the calculator, or the keyboard shortcuts. For questions about privacy and data, see the privacy policy.
Supporting coolca.lc
coolca.lc is free to use. If you'd like to say thanks, you can buy us a coffee.