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Ratio Calculator

Simplify a ratio (A:B). Optionally solve for an unknown in a proportion (A:B = C:D).

Enter three values and leave one empty to solve: A:B = C:D

Results

Simplified ratio: —
As decimal (A/B): —
Proportion solution: —
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About This Calculator

The Ratio Calculator simplifies ratios to their lowest terms and solves proportions. Enter a ratio to simplify it, or set up a proportion with an unknown value to solve for X.

How to Use

  1. Enter the values for your ratio A:B
  2. Click Simplify to reduce to lowest terms
  3. For proportions, enter A:B = C:X and solve
  4. View equivalent ratios and scaling factors

Practical Use Cases

  • Cooking: Scale recipes up or down
  • Construction: Calculate material proportions
  • Photography: Understand aspect ratios
  • Maps: Work with scale ratios
  • Mixing: Calculate paint, concrete, or chemical ratios

? Frequently Asked Questions

How accurate is this

This calculator uses standard formulas and provides accurate results for typical use cases. For professional or critical applications, always verify results with certified professionals or official sources.

Is this calculator free to use?

Yes, this Math Ratio Calculator is completely free to use with no registration required. You can use it as many times as needed without any limitations.

Can I use this on mobile devices?

Absolutely! This calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers.

How do I interpret the results?

The results are displayed clearly with appropriate units. Refer to the "About This Calculator" section for detailed information.