Terms of use

Using this site

NumberOneCalc is free to use, without an account, for personal or commercial reference. By using it you agree to these terms.

Results are estimates

Every calculator here produces an estimate based on the formula shown on its page and the numbers you enter. Results are not professional financial, tax, medical, legal or engineering advice, and should not be treated as a substitute for advice from a qualified professional. Verify anything with real consequences before acting on it.

No warranty

This site is provided "as is", without warranty of any kind, express or implied, including accuracy, completeness or fitness for a particular purpose. Formulas and assumptions are documented on each calculator so you can check them, but we do not guarantee a result is error-free.

Limitation of liability

To the fullest extent permitted by law, NumberOneCalc and its operator are not liable for any loss or damage arising from reliance on a calculator result or from the site being unavailable.

Content and code

Page layouts, wording and design on this site belong to NumberOneCalc. You are welcome to link to any page or share a result you calculated; wholesale copying of page content is not permitted.

Changes

These terms may be updated as the site grows. The date above changes whenever they do — continued use after an update means you accept the revised terms.

Questions

For anything about these terms, use the contact page. See also the privacy policy.