Ratio Calculator
Simplify ratios, solve proportions and scale ratios with step-by-step working.
Enter the two parts of the ratio
:
Simplified Ratio
3 : 2
1.5
A to B
0.6666666667
B to A
60%
A as %
RatioProportionSimplifyScaleFractions
A ratio calculator with three modes: simplify a ratio to its lowest terms, solve a proportion to find a missing value, and scale a ratio up or down by a factor.
Key Features
Simplify Mode
Reduces a ratio A:B to its simplest form using GCD — works with decimal inputs too.
Proportion Mode
Solves A:B = C:? or ?:B = C:D type proportions, showing the calculation step.
Scale Mode
Multiplies both parts of a ratio by a scale factor and shows original, simplified and scaled results.
Decimal Ratios
Handles non-integer inputs by scaling up to integers before simplifying.
How to Use
- 1Select Simplify, Proportion or Scale mode.
- 2Enter the required values.
- 3The result and working steps appear immediately.