Terms of use
Last updated
By using this site, you agree to these terms. The site offers free math tools and plain-English information. It does not offer medical advice, and you are responsible for how you use its results.
Use of the tools
- The calculators and charts are for education and math practice only.
- Always check a result yourself before relying on it. Each calculator shows its steps so you can.
- Do not use the site as a substitute for advice from a qualified healthcare professional.
No warranty
We work hard to keep every number correct, but the site is provided “as is”. We make no promise that it is free of errors or always available.
Limitation of liability
To the fullest extent the law allows, we are not liable for any loss or harm that comes from using, or being unable to use, the site or its results.
Content
You may link to any page and share calculator results. Please don’t copy large parts of the site without permission.
Changes
We may update these terms. The date at the top shows when they last changed. If you keep using the site after a change, you accept the new terms.
Contact
Questions about these terms? Use the contact page.