About the Equivalent Ratio Calculator
Generate a table of equivalent ratios or scale a ratio so one term matches a target value.
Also known as: equivalent ratios, scale a ratio, ratio table, find equivalent ratio.
How to use this calculator
- Enter a, b, target value for a (optional).
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
a : b = ka : kb
Worked example
Using the values pre-filled in the calculator above:
- A = 3
- B = 5
- Target value for A (optional) = 12
the calculator returns:
- Ratio: 3 : 5
- When A = 12: 12 : 20