Terms of Use

Last updated: November 3, 2026

By using 33calculators, you agree to these terms. They're short.

Using the site

The site is free and needs no sign-up. You can use it for personal tasks, study and work.

Results

Each calculator uses the formula described on its page. Results are provided as is, with no guarantee that they're accurate or fit for your purpose.

For anything important, such as money, health, training, construction or legal deadlines, check the result yourself. The site doesn't give financial, medical, legal or training advice.

Liability

To the extent the law allows, we're not liable for any loss caused by using the results or by the site being unavailable.

What you can't do

  • Break or overload the site.
  • Bulk-download it with automated tools in ways that bypass robots.txt.
  • Pass off the site or its text as your own.

Ownership

The text, design and logo belong to 33calculators. Formulas and the math behind them belong to everyone.

Some pages link to other sites, such as the sources of formulas. We're not responsible for them.

Changes to these terms

When the terms change, the Last updated date at the top changes too. If you keep using the site after that, you accept the new terms.

Contact

Questions: [email protected].