Ratio Calculator

Use the free ratio calculator to compute ratio instantly. Includes the formula, a worked example and FAQs. No sign-up.

What is the Ratio Calculator?

The ratio calculator is a free online tool that helps you work out ratio quickly and accurately. It uses the standard formula Simplify A:B by their GCD; scale proportionally if a target is given and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.

How to use this calculator

  1. Enter the two terms.
  2. Optionally scale term A to a new value.
  3. See the simplified and scaled ratio.

Formula used

Simplify A:B by their GCD; scale proportionally if a target is given

Explanation of each input

  • Term A โ€” the term a used in the calculation.
  • Term B โ€” the term b used in the calculation.
  • Scale A to โ€” the scale a to used in the calculation.

Understanding your result

  • Simplified ratio โ€” the calculated simplified ratio.
  • Scaled B โ€” the calculated scaled b.

Step-by-step calculation

For the example values 4:6:

  1. Apply the formula: Simplify A:B by their GCD; scale proportionally if a target is given
  2. Substitute the values: divide by 2
  3. Result: 2:3

Worked example

Inputs4:6
Workingdivide by 2
Result2:3

Benefits and practical uses

This calculator saves you time and reduces errors when you need ratio. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.

Assumptions and limitations

  • Positive terms.

Frequently asked questions

How do I simplify a ratio?

Divide both terms by their greatest common divisor.

Disclaimer: Results are provided for general information. Please verify important figures independently.