Everyday
Ratio Calculator
Simplify a ratio between two positive values and show the corresponding decimal relationship.
- Free to use
- Runs in your browser
- Level A · Standard formula
- Last reviewed 2026-08-16
Calculator guide
How to use the Ratio Calculator
Simplify a ratio between two positive values and show the corresponding decimal relationship. Enter the requested values and select Calculate. The result and supporting values are produced locally in your browser.
Formula
Worked example
A ratio of 15 to 25 simplifies to 3:5.
What to keep in mind
- Both values must be positive.
- Decimal inputs are normalized to six decimal places before simplification.
Methodology
This calculator uses deterministic arithmetic and performs the calculation locally in your browser. Verify assumptions, units, and source values for your specific use case.
Review standard: Level A · Standard formula. How calculator reviews work.
Frequently asked questions
What does this calculator calculate?
Simplify a ratio between two positive values and show the corresponding decimal relationship.
How is the result calculated?
Simplified Ratio = A ÷ GCD : B ÷ GCD.
Can I use the result for an important decision?
Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.
Does CalculateMeasure store the values I enter?
The calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.