Terms of use

Last updated 4 September 2026.

Using the site

Derivative Calculator is provided free of charge for study and reference. You may use it for personal, educational and commercial work, and you may quote its explanations with attribution.

No warranty

The calculator is offered as it is, without warranty of any kind. The engine is tested against numerical differentiation and every published example is machine-checked, but no software is free of error. Do not rely on a result for anything consequential without checking it yourself.

Acceptable use

Please do not attempt to disrupt the service, scrape it at a rate that degrades it for others, or present it as your own product. Automated access to the pages is fine at a courteous rate.

Content and ownership

The explanations, worked examples and source code are the work of the site's maintainers. Mathematical results themselves are not owned by anyone; the wording, layout and code are.

Links

Pages may link to third-party resources. Those sites have their own terms and we are not responsible for their content.

Changes

These terms may be revised. The date above marks the most recent revision, and continuing to use the site after a change means accepting it.

Contact

Questions about these terms go to hello@derivativescalculator.org or through the contact page.