Terms of use.

The short version

Calculator Online is provided for free as an educational tool. The math is checked, but the calculators are illustrative, not professional advice. Verify any result with a licensed professional before acting on it.

You can use the site for any lawful purpose, personal or commercial. You cannot copy the underlying source or content wholesale without permission.

1. Acceptance

By accessing or using Calculator Online, you agree to these terms. If you do not agree, do not use the site.

2. Use of the site

Calculator Online is free to access. You may use the calculators for personal, educational, or commercial purposes, subject to the rest of these terms.

You agree not to: attempt to disrupt or overload the site or its underlying services; scrape the site at a rate that would burden our infrastructure; misrepresent the source of the content; or use the site for any unlawful purpose.

3. Accuracy and limitations

We work hard to make every calculator accurate. Every formula is sourced and reviewed. That said, calculators are tools, not authoritative pronouncements.

Results on Calculator Online are illustrative. They are based on standard formulas applied to the inputs you provide. They do not account for your specific situation, jurisdiction, medical history, tax bracket, or other factors that a qualified professional would consider.

Before making a financial, medical, legal, or other significant decision based on a calculator result, consult a qualified professional.

4. Live data

A small number of calculators (e.g. the currency converter) pull live reference data from third-party APIs. We have no control over the availability or accuracy of those external services. If the external service is down or returns stale data, our calculators will fall back to static reference values and clearly indicate this.

5. Intellectual property

The Calculator Online name, design, written content, and the way calculators are presented are protected by copyright and other intellectual-property laws.

Underlying mathematical formulas are not owned by us, they are part of the public knowledge commons. You can reuse the formulas freely; you cannot copy our written explanations, design, or page structure wholesale.

6. Third-party links

Calculator Online links to third-party sources (Wikipedia, government health sites, peer-reviewed journals, etc.) for verification. We do not control those sites and are not responsible for their content.

7. Disclaimers

The site is provided "as is" without warranties of any kind, express or implied. We do not warrant that the site will be uninterrupted or error-free, or that calculator results will be suitable for any particular purpose.

In no event will Calculator Online be liable for any indirect, incidental, or consequential damages arising from your use of the site or reliance on its content.

8. Changes to these terms

We may update these terms from time to time. The Last updated date at the top reflects the most recent revision. Continued use of the site after a change constitutes acceptance.

9. Governing law

These terms are governed by the laws of the jurisdiction in which Calculator Online is operated. Disputes will be resolved in the courts of that jurisdiction.