Contact us

Email

The simplest way to reach us is by email:

contact@cic4.cc.cd

We usually reply within three working days. To help us answer quickly, please include:

• Calculation problem: the inputs you used, the page address and the result you expected, so we can reproduce it.
• Content correction: the article title and the specific paragraph.
• Advertising or business enquiry: a short description of what you have in mind.

Read this first

These questions already have clear answers, which may save you some time:

• Does the calculator cost anything? No. No registration, no fees — just open the page.
• Can you recommend a financial product? No. We do not give investment advice or sell products, and we cannot answer that kind of request.
• Is my data recorded? No. All calculations run in your browser; see our privacy policy.

Other channels

We currently communicate by email only. We have no social accounts and no instant-messaging support, so please be wary of anyone contacting you in our name.