These Terms of Use explain the rules for using Proportion Calculator, a free proportion calculator website for students, teachers, and parents. By using this website, you agree to these terms. If you do not agree with them, please do not use the site.
Educational and General Use
The calculator and the guides on this site are provided for education and general use. They are meant to help you learn how proportions work, check homework, and solve everyday problems such as recipe scaling and unit prices. They are not a substitute for professional advice, and they are not intended for safety-critical or medical decisions.
Check Important Calculations
Always check important calculations before you rely on them. A mistyped number, a wrong unit, or a value entered in the wrong box can change the answer, even when the calculator itself works correctly. Use the steps and the cross-product check shown by the calculator, and work through the problem a second way when the result matters.
No Responsibility for Decisions Based on Results
The site is not responsible for decisions you make based on calculator results or guide content. That includes homework answers, purchases, cooking amounts, building measurements, and any other choice that follows from a calculation. You are responsible for checking that the numbers and units you enter match your real problem.
Content and Copyright
The text, examples, and calculator on this site are the original content of Proportion Calculator. Content must not be copied, republished, or sold without permission. You may link to any public page on this site, and you may quote a short passage with credit and a link back to the page it came from.
Acceptable Use
Please use the site fairly. Do not try to damage, overload, or gain unauthorized access to the site, and do not use the contact form to send spam, harmful content, or messages that break the law. The site owner may block use that harms the site or its visitors.
Changes to These Terms
These terms may be updated from time to time. The updated version will be posted on this page, and continued use of the site after an update means you accept the updated terms. Questions about these terms can be sent through the Contact page.