Terms of use

Last updated: October 7, 2026.

Use of the tools

You may use every calculator on this site freely for personal, educational, and commercial purposes. Automated bulk querying that degrades the site for others is not permitted.

No warranty

The tools are provided “as is” for educational purposes. While every engine function is tested, mathematics software can contain errors, verify critical results independently. See the disclaimer.

Content

Page copy, examples, and explanations are original to this site. You may quote brief excerpts with attribution; systematic reproduction of the site’s content is not permitted. Mathematical formulas themselves are universal knowledge and free for anyone to use.

Changes

Tools may be improved, extended, or occasionally removed as the site develops. The core promise, free calculators with steps shown, does not change.