Contact us
Suggest a calculator, report a wrong number, or ask about advertising — we read everything.
For bug reports, include the calculator name, what you entered, and what you expected — it helps us fix things fast.
Frequently asked questions
How do I suggest a new calculator?
Email us at hello@calcnest.com with the calculation you'd like — the most requested ideas get built first.
I think a calculator gave a wrong answer — what should I do?
Tell us which tool, what inputs you used, and what you expected. We'll verify the math and fix it.