Solve ratios, find missing values, and simplify ratios with visual breakdown
Enter values to calculate the ratio
Add, subtract, multiply, and divide fractions with simplified results
Calculate percentages, percentage of a number, and percentage change
Solve linear and quadratic equations with step-by-step results
Calculate the Greatest Common Divisor and Least Common Multiple
Ratio Calculator is a free online tool that solves ratio problems and simplifies ratios. In Find Missing mode, enter three values of the proportion A:B = C:D and the tool calculates the missing fourth value. In Simplify mode, enter any ratio A:B and get its simplest form. The tool also shows the decimal ratio, percentage breakdown with a visual bar, and the formula used. Perfect for math homework, cooking recipes, scale drawings, and business calculations. All processing happens in your browser.