Ratio Calculator
Calculate, simplify, compare, and solve ratios instantly. Use our free Ratio Calculator to find equivalent ratios, ratio values, proportions, and ratio relationships quickly and accurately.
Ratio Calculator
Simplify ratios, compare values, and calculate percentages instantly.
Construction Calculators
Other Calculators
How the Ratio Calculator Works
Follow these simple steps to get accurate results instantly.
Enter Ratio Values
Enter the two numbers that form the ratio.
Find Greatest Common Divisor
The calculator finds the GCD of both numbers.
Simplify Ratio
Both values are divided by the GCD to produce the simplest ratio.
View Results
See simplified ratio, ratio value, and percentage representation.
Ratio Calculator Formula
Simplified Ratio = A ÷ GCD : B ÷ GCD
A ratio compares two quantities. To simplify a ratio, divide both numbers by their greatest common divisor (GCD). Ratios are commonly used in mathematics, finance, business, statistics, engineering, and everyday problem solving.
Example Calculation
Input: 20 : 30
Output: 2 : 3
Common Uses
- • Mathematics
- • Ratio and Proportion Problems
- • Statistics
- • Business Calculations
- • Engineering Calculations
- • Financial Analysis
- • Data Analysis
- • School Homework
- • Competitive Exams
- • Research
Frequently Asked Questions
Verified answers to essential calculation and diagnostic questions.
A Ratio Calculator simplifies ratios, finds equivalent ratios, and helps solve ratio and proportion problems.
A ratio compares two quantities and shows their relationship using the form A:B.
Divide both numbers by their greatest common divisor (GCD).
The simplified ratio of 20 and 30 is 2:3.
Equivalent ratios represent the same relationship between numbers after multiplication or division by the same value.
Yes. Ratios can be converted into percentages by calculating each part's share of the total.
Ratios are used in mathematics, statistics, finance, engineering, science, and everyday calculations.
To solve a proportion such as a/b = c/x, cross-multiply to get a · x = b · c, then divide both sides by a to solve for the missing term x = (b · c) / a.
Written & maintained by Aditya Singh
Aditya Singh is a software engineer and the founder of DevCalc, based in Uttar Pradesh, India. He builds and maintains every calculator on this site, using standard, verified formulas — the same ones used by banks, institutions, and educators — with careful attention to accuracy. Read more about the author →