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Ratio Calculator

Calculate ratios, find missing values, simplify ratios, and get percentage breakdown. Perfect for proportions and scaling.

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Enter one value to find the other

Ratio Results

Original Ratio 0:0
Simplified Ratio 0:0
Decimal Value 0

Percentage Breakdown

A Percentage 0%
B Percentage 0%

Equivalent Ratios

- - - - - - - - - - - - -

How to Use the Ratio Calculator

  1. Enter the ratio values A:B (e.g., 3:4).
  2. Optionally, enter one partial value to find the missing value using proportion.
  3. Click "Calculate Ratio" to see simplified ratio and percentage breakdown.
  4. View equivalent ratios for scaling purposes.

Frequently Asked Questions

What is a ratio?

A ratio compares two quantities showing their relative sizes. It's expressed as A:B, meaning "A to B". Ratios are used in cooking, maps, scale models, and many real-world applications to maintain proportional relationships.

How do I simplify a ratio?

To simplify a ratio, divide both numbers by their greatest common factor (GCF). For example, 12:8 simplifies to 3:2 by dividing both by 4. The simplified ratio maintains the same proportional relationship.

What are equivalent ratios?

Equivalent ratios are ratios that represent the same proportional relationship. For example, 1:2, 2:4, 3:6, and 4:8 are all equivalent. They can be obtained by multiplying or dividing both parts of the ratio by the same number.

How do I find a missing value in a proportion?

Use cross-multiplication: if A:B = C:D, then A×D = B×C. To find a missing value, set up the proportion and solve for the unknown. Our calculator does this automatically when you enter one partial value.

When would I use ratios in real life?

Ratios are used for: cooking recipes (scaling ingredients), map scales (distance representation), mixing paint colors, financial ratios (debt-to-income), aspect ratios (screens and images), and maintaining proportions in design and engineering.