Terms
Terms of use
Last updated 22 October 2026.
By using this site you agree to these terms. They are short, and the substance is: the tool is free, it is provided as-is, and you are responsible for checking your own work.
Licence to use
You are granted a free, non-exclusive, revocable licence to use the calculators and tutorials on this site for any purpose, personal or commercial, including use in paid courses and classroom materials.
You may not resell the calculators as a standalone product, or redistribute the site's code as your own. Embedding is expressly permitted — see for your site.
No warranty
The calculators and tutorials are provided "as is", without warranty of any kind. Every effort is made to ensure the worked solutions are correct, and the step solver is tested against a regression suite, but no guarantee is given that any particular result is free of error.
Do not rely on this site as the sole source for anything where an incorrect answer carries real consequences — an exam, an engineering calculation, a medical dose, or a financial decision. Verify against your own working or an independent source.
Limitation of liability
To the maximum extent permitted by law, the operator is not liable for any loss or damage arising from use of, or inability to use, this site. This includes consequential loss, loss of data, and loss arising from reliance on a worked solution.
Acceptible use
You agree not to:
- Attempt to disrupt, overload or gain unauthorised access to the site or its infrastructure.
- Scrape the content at a rate that harms availability for others.
- Present worked solutions from this site as your own original instruction in a competing paid product without attribution.
- Use the site in a way that infringes the rights of Texas Instruments or any third party.
Trademarks
TI-84 Plus™ and TI-83 Plus are trademarks of Texas Instruments Incorporated. Use of these marks is descriptive, to identify the keypad layout being emulated. This site is not affiliated with, sponsored by, authorised by, or endorsed by Texas Instruments. The full disclaimer sets this out in detail.
Exam use
No online calculator is permitted during official SAT, ACT or AP examinations. This site exists for practice and rehearsal only. Nothing here should be taken as a claim of exam approval — only Texas Instruments' own hardware appears on official permitted-device lists.
Changes
These terms may be updated. Continued use after an update constitutes acceptance of the revised terms. The date at the top reflects the most recent change.
Governing law
These terms are governed by the laws applicable at the operator's place of business, without regard to conflict-of-law principles.
Contact
Questions about these terms go through the contact page.