Ratio Calculator
Enter two values A and B to compute the ratio A:B expressed as a decimal (A ÷ B).
Calculator
Use the Ratio Calculator
Result
—
Formula
A ÷ B
Step-by-step
- 1
Provide A and B
Enter the two values for the ratio.
- 2
Compute decimal
Divide A by B to get the decimal ratio.
Worked example
Example input: a: 3, b: 2
Result: 1.5
Related tools
- Proportion Calculator
Solve proportional relationships.
Frequently asked questions
What does the ratio calculator return?
The decimal value of A divided by B: entering 10 and 4 gives 2.5, the same fact written as the ratio 5:2. Decimals are the standard single-number way to state a ratio precisely. Reports and dashboards quote the decimal form directly, which is why this exact value is what the tool prints.
What happens when B is zero?
No ratio exists — dividing by zero produces no number. The calculator reflects that by reporting an infinite result rather than inventing a finite value, so treat a zero denominator as invalid input.
Is a ratio the same thing as a fraction?
Numerically yes: 2.5 is 5/2 is 10:4 — one value, three clothing styles. The difference is only presentation: fractions name one quantity, ratios usually compare two of them.