Ratio Calculator
Solve your Ratio Calculator problems instantly. Free online Arithmetic utility with detailed results and no registration required.
Ratio Calculator
Solve equivalent ratios instantly. Enter 3 of the 4 values (A : B = C : D) and the calculator will find the missing value.
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=
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Leave exactly one field empty to calculate its value.
Calculated Missing Value
30
4 : 10 = 12 : 30
Decimal Ratio0.40
Percentage40%
Inverse Ratio2.50
How to Use Ratio Calculator in 3 Easy Steps
1
Step 1
Enter your coefficients, numbers, or expressions into the specified fields.
2
Step 2
Click the calculate button (or most tools update instantly).
3
Step 3
View the result and any additional insights in the results panel.
Frequently Asked Questions
Yes, all our academic and Arithmetic tools are 100% free and don't require an account.
For most algebraic tools, we provide the final result and key intermediate values like denominators or intercepts.
Absolutely. All ToolsHub calculators are fully responsive and work on any smartphone or tablet.