Found a bug? Have an idea for a new calculator? Press enquiry? We read every message personally and get back to you quickly.
The fastest way to reach us. We aim to reply within 1–2 business days.
contact@calcuja.comWe are based in Western Europe — in the heart of Europe.
Western Europe
Time zone: CET/CEST (UTC+1/+2)
Getting a wrong result? Seeing a layout issue? Tell us the calculator name, your inputs, and what you expected. We fix bugs fast.
Missing a calculator you’d love to see? We genuinely listen to user requests. Most of our best calculators started as user ideas.
Writing about personal finance, productivity, or AI risk? We’re happy to provide data, quotes, or calculator embeds for editorial use.
Interested in embedding Calcuja tools on your platform, or exploring a data partnership? Drop us a line with details about your use case.
Privacy note: Any information you share with us is used only to respond to your enquiry and is never passed to third parties. See our Privacy Policy for details. Your calculator inputs remain private — they never leave your browser.