Ratio Calculator
Calculate and solve ratios and proportions. Find missing values in A:B = C:D equations.
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Quickly calculate and solve ratio problems without manual math. Whether you need to find missing values in proportions, simplify ratios, scale measurements, or work with aspect ratios, this tool handles it all instantly.
How it works
- 1Enter your known ratio values into the calculator fields
- 2Input any missing values you want to find or solve for
- 3Click calculate to instantly get your results
- 4Use the simplified ratio or scaled values in your project
Who uses this tool
- ✓Students solving proportion problems for math homework
- ✓Designers calculating aspect ratios for images and layouts
- ✓Chefs scaling recipes up or down by ingredient ratios
- ✓Engineers and architects working with scale models
- ✓Content creators resizing media while maintaining proportions
Frequently Asked Questions
How do I use Ratio Calculator?
Enter any two values of a ratio and the tool simplifies it to its lowest terms and calculates the missing value if needed.
Is Ratio Calculator free?
Yes, Ratio Calculator on ToolPix is 100% free with no signup or installation required.
Is my data safe?
All processing happens in your browser, your data never leaves your device.
Can it solve proportions?
Yes — enter three of the four values in a proportion (A:B = C:D) to solve for the missing one.
What are ratios used for?
Ratios are used in recipe scaling, image aspect ratios, map scales, financial analysis, and many everyday calculations.
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