Questions about a specific calculator? Found a bug in the math? Have a suggestion for a new calculator tool you would like to see added? Send us a message — we read every email and use your feedback to improve the site.
Email: contact@calculator-ok.com
We typically respond within 1-2 business days. Bug reports and formula corrections get priority — if a calculator produces incorrect results, let us know the specific inputs you used so we can reproduce and fix the issue quickly.
To help us resolve your question faster, include the following information when reporting an issue:
We are always looking to add calculators that people actually need. If there is a math formula or calculation you find yourself doing by hand repeatedly, tell us about it. Recent additions have come directly from user suggestions. We prioritize tools that serve students, teachers, and working professionals in geometry, algebra, and arithmetic.
Calculator-OK is available in 28 languages. If you notice a translation error in the interface or the formula explanations, please report it — we rely on native speakers to catch mistakes that machine translation misses. Include the language and the specific page where you found the issue.
For advertising, partnership, or media inquiries, use the same email address above with "Business" in the subject line. We respond to all professional inquiries within 3 business days.
Bookmark the site and check back — we add new calculators based on user requests. The full list of available tools is always at the sitemap page. If you find Calculator-OK useful, consider sharing it with a classmate, colleague, or on social media. Word of mouth helps us keep the site free for everyone.