Contact Us
Bug reports, corrections, tool requests, or anything else — we read every message.
What to write about
Report a bug
Something broken, a tool that will not load, a result that looks wrong? Tell us which tool, what you entered, and what happened. That is usually enough for us to reproduce and fix it.
Correct a formula
If a calculation looks incorrect, we want to know immediately — a wrong calculator is worse than no calculator. Send us the numbers you used and what you expected. We will verify and fix it.
Request a tool
Need a calculator that does not exist here yet? Describe what it should do and why. Many tools on this site started as a request from someone who could not find what they needed.
Translation feedback
Doia is available in English, Arabic, and Spanish. If something reads awkwardly in your language, or a term is wrong, please tell us. Native-speaker corrections are genuinely valuable.
Business and partnerships
Interested in advertising, licensing our tools for your own site, or a partnership? Get in touch and tell us what you have in mind.