Ratio Calculator
Reduce an integer ratio and find a proportional value for a new first term.
Result
How to use
Enter A, B and the new first term C.
Run the tool to calculate or transform the input.
Copy the result or save it as a text file.
FAQ
What rules does this tool use?
For A:B = C:D, the missing value D is C × B / A. The ratio uses the greatest common divisor.
What are the limits?
A and B must be positive integers. Proportional output can be a rounded decimal.
Are my inputs uploaded?
Tool inputs are processed in your browser. Advertising makes separate requests as described in the privacy policy.