Terms of use

By using Numerith you agree to these terms. If you do not agree, please do not use the site.

Free use, no account

The calculators are free to use for personal and commercial purposes. No registration is required.

Information, not advice

Numerith provides general calculation tools and educational explanations. Results depend on the inputs you provide and the assumptions stated on each page. They are not financial, investment, tax, legal, medical, engineering or other professional advice. See the disclaimer.

Accuracy

We test every calculator against independently computed reference values and document its formula, but we cannot guarantee that results are free of errors or suitable for your purpose. Rules such as tax rates change; inputs that depend on them must be supplied by you from official sources. Check important results independently before relying on them.

Acceptable use

• Do not attempt to disrupt the site, overload it with automated requests, or bypass its security.
• Do not misrepresent results from Numerith as official figures from a government, lender or other organisation.

Intellectual property

The Numerith name, logo, design, code and written content are protected by copyright and other laws. You may share links to any page and quote short excerpts with attribution.

Third-party links

Pages may link to external sources such as standards bodies or research papers. We are not responsible for the content of other sites.

Limitation of liability

To the extent permitted by law, the site is provided “as is”, without warranties of any kind, and the operator is not liable for losses arising from use of, or inability to use, the site or its results.

Changes

These terms may be updated. The date above shows when they last changed. Continued use after a change means you accept the updated terms.