Ratio Calculator
Solve proportions and scale ratios
How to Use
1
Choose mode
Select Simplify, Solve Proportion, or Scale Ratio.
2
Enter ratio values
Input your ratio values (e.g., 12:8 or 3:4).
3
Set target if needed
For proportions, enter the known value to solve for the unknown.
4
View result
See the simplified ratio, proportion solution, or scaled values.
Frequently Asked Questions
How do I simplify a ratio?
Divide both numbers by their greatest common divisor (GCD). Example: 12:8 → 3:2 (dividing by 4).
How do I solve a proportion?
For a:b = c:x, solve by cross-multiplying: a×x = b×c, so x = (b×c)/a.
What is scaling a ratio?
Multiplying or dividing both parts by the same number. 2:3 scaled by 4 becomes 8:12.
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