By using 4Calculators you agree to these terms. If you do not agree, please do not use the site.
Permitted use
You may use these calculators freely for personal, educational and commercial work, including in the course of your profession. You may cite and link to our pages. You may not scrape the site at scale, republish substantial portions of our content as your own, or present our calculators as another party's product.
No professional advice
The calculators and articles on this site are informational and educational tools. They do not constitute financial, investment, tax, legal, medical, engineering, or architectural advice, and using them creates no professional relationship. Results are estimates derived from the inputs you supply and the assumptions stated on each page.
For any decision carrying legal, financial, structural, electrical, or medical consequence, have your figures independently verified by a licensed professional and confirm the code, standard, or regulation that applies in your jurisdiction.
Accuracy
We work hard to be correct — formulas are sourced, calculators are tested against published examples, and errors are corrected promptly. We nonetheless make no warranty that any result is free of error or fit for a particular purpose. Codes change, standards are revised, and local amendments differ. You remain responsible for verifying results before relying on them.
Limitation of liability
To the maximum extent permitted by law, 4Calculators and its contributors are not liable for any direct, indirect, incidental, consequential, or special loss or damage arising from your use of, or inability to use, this site or its content — including losses arising from reliance on a calculated result.
Intellectual property
The text, explanations, page designs, code and compilation of this site are the property of 4Calculators and are protected by copyright. Mathematical formulas and published standards are not owned by us; our expression, explanation and implementation of them is. You may quote briefly with attribution and a link.
Third-party links and advertising
We link to third-party sources and display third-party advertising. We do not control that content and are not responsible for it. A link is not an endorsement.
Changes and governing law
We may revise these terms; the date at the top of this page records the current version. These terms are governed by the laws of the United States and the state in which 4Calculators's publisher is established, without regard to conflict-of-laws rules.