Solve proportions, simplify ratios, convert ratios, scale and compare ratios
Utility Tools
About This Tool
Ratio Calculator is an online tool that helps you solve proportions, simplify ratios, convert ratios to fractions and percentages, scale ratios by a factor, and compare two ratios. All calculations run locally in your browser with instant results.
Key Features
- Solve proportions by finding the missing value (A:B = C:X)
- Simplify two-part (A:B) and three-part (A:B:C) ratios
- Convert ratios to fraction, decimal, and percentage forms
- Scale ratios up or down by a custom factor
- Compare two ratios and determine which is greater
- All calculations run locally with instant results
Use Cases
- Solve recipe proportion adjustments for different serving sizes
- Simplify aspect ratios for screen or image dimensions
- Convert financial ratios to percentages for analysis
- Scale architectural or engineering ratios by a specific factor
- Compare two ratios to determine which offers better value
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Frequently Asked Questions
How do I solve a proportion with this tool?
Enter three known values of a proportion (e.g., A:B = C:X) and the calculator will find the missing value X. It supports both A:B = C:X and A:B = X:D formats.
Can I simplify ratios with three parts?
Yes, the Simplify Ratio section supports both two-part (A:B) and three-part (A:B:C) ratios. It reduces them to their simplest integer form using the greatest common divisor.
What does the Convert Ratio feature do?
It converts a ratio A:B into three equivalent forms: a simplified fraction, a decimal number, and a percentage. This is useful for understanding ratios in different mathematical contexts.
How does the Scale Ratio feature work?
Enter a ratio A:B and a scaling factor, then choose Scale Up to multiply both parts by the factor, or Scale Down to divide both parts. The result preserves the same proportion at a different scale.
How does the Compare Ratios feature determine which is greater?
It calculates the decimal value of each ratio (A/B and C/D) and compares them. The result shows which ratio is greater along with their decimal equivalents, or indicates if they are equal.