Proportion Calculator - Free, Instant, In Your Browser
Solve A : B = C : X for the missing value with the cross-multiplication rule of three. Fill in the fields and press Calculate to see the result.
How to use Proportion Calculator
- 1Enter the required date(s) and details above.
- 2Click Calculate - Proportion Calculator runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.
Is it free? Do I need an account?
Yes, it is free, and there is nothing to sign up for.