Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Math
Proportion Calculator
Find the missing fourth value d in any proportion a/b = c/d when three values are known. Perfect for scaling recipes, converting units, solving map distances, and cross-multiplication problems.
Fill in the required fields to see your result.
Math
Ratio Calculator
Simplify any two-number ratio to its lowest terms and explore equivalent ratios in seconds. Ideal for cooking, map scaling, financial analysis, and mixing solutions where proportional relationships matter.
Fill in the required fields to see your result.
Key differences
| Proportion Calculator | Ratio Calculator | |
|---|---|---|
| Category | Math | Math |
| Inputs required | 3 | 2 |
| Result | d | Ratio (decimal) (:1) |
| What it does | Find the missing fourth value d in any proportion a/b = c/d when three values are known. Perfect for scaling recipes, converting units, solving map distances, and cross-multiplication problems. | Simplify any two-number ratio to its lowest terms and explore equivalent ratios in seconds. Ideal for cooking, map scaling, financial analysis, and mixing solutions where proportional relationships matter. |