Ratio Calculator
Free online Ratio Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Ratio A:B = A/B simplified by GCD. Proportion: A/B = C/D, solve by cross-multiplication: AD = BC. Scale ratio by multiplying both parts equally.
Example Calculations
Simplify Ratio
Input: 24:36
Result: 2:3
Find Missing Value
Input: 3:5 = x:25
Result: x = 15
Scale Ratio
Input: Scale 1:50 for 200cm real distance
Result: Map distance: 4cm
About This Calculator
Free online ratio calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our ratio calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
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Frequently Asked Questions
What is a ratio?
A comparison of quantities showing relative sizes. Used in cooking, maps, screens, finance, and construction.
How to simplify a ratio?
Divide all parts by their GCD. Ratio 12:8 simplifies to 3:2.
Find a missing value in a ratio?
Set up a proportion and cross-multiply. If 2:3 = x:15, then x = 10.
Ratio vs proportion?
A ratio compares two quantities (3:4). A proportion states two ratios are equal (3:4 = 6:8).
Real-life uses of ratios?
Cooking, map scales, screen aspect ratios (16:9), debt-to-income ratio, and concrete mixes.