Core tool
Ratio Simplifier
Reduce two or more values to the simplest equivalent ratio.
Simplify a ratio →Choose a tool
Ratio & Proportion Calculators
Jump directly to the calculation you need. Every tool runs in your browser and shows the result without sign-up.
Solve for x
Proportion Calculator
Find any missing value in two equal ratios using cross multiplication.
Solve a proportion →Same direction
Direct Proportion
Calculate the matching value when both quantities change by the same factor.
Calculate direct proportion →Opposite direction
Inverse Proportion
Calculate the missing value when one quantity rises as the other falls.
Calculate inverse proportion →Equivalent ratios
Equivalent Ratios
Generate equivalent ratios and check whether two ratios are equal.
Generate equivalent ratios →3-part ratios
3-Number Ratio Simplifier
Reduce a three-part ratio with one common factor.
Simplify 3 numbers →Convert
Fraction to Ratio
Turn a fraction such as 3/4 into a simplified ratio.
Convert a fraction →Convert
Percentage to Ratio
Turn a percentage into a simplified two-part ratio.
Convert a percentage →Convert
Ratio to Percentage
Convert a two-part ratio into percentages and shares of the total.
Convert a ratio →Convert
Decimal to Ratio
Convert a decimal into a simplified whole-number ratio.
Convert a decimal →