Contact Us

Frequently Asked Questions

Are all tools on TheCalculatorOnline free?

Yes — every single tool is 100% free to use. There are no premium plans, no subscriptions, and no hidden fees. We keep the site free through non-intrusive advertising.

Do you store the data I enter into tools?

No. All calculations happen in your browser or on our server for display purposes only. We never store, log, or share the text, numbers, or personal data you enter into any tool.

Can I suggest a new tool?

Absolutely! Use the contact form above, select "Tool Suggestion" as the subject, and describe the tool you'd like us to build. We review every suggestion and add popular ones regularly.

I found a bug. How do I report it?

Please use the form above, select "Bug Report", and describe what happened — include the tool name, what you entered, what result you expected, and what you actually got. Screenshots help too!

Can I use TheCalculatorOnline on my mobile phone?

Yes! Our website is fully responsive and works great on phones, tablets, and desktops. Every tool is optimized for touch input and small screens.

How do I advertise on TheCalculatorOnline?

We currently display ads via Google AdSense. For direct advertising inquiries, select "Partnership / Advertising" in the contact form and we'll get back to you with details.