Ratio Calculator
Simplify ratios to lowest terms, convert a ratio to a decimal, scale to any value, and compare two ratios. For recipes, map scales, and aspect ratios.
:
Simplified
16 : 9
Decimal
1.777778
How to use the ratio calculator
Enter two numbers — the ratio is simplified to lowest terms (for integers) and shown as a decimal.
Formula & explanation
Simplified ratio: divide both terms by GCD. Decimal: a ÷ b.
Examples
16 : 9 is already simplified, decimal 1.778. 24 : 36 simplifies to 2 : 3.
Frequently asked questions
- What does simplifying a ratio mean?
- Simplifying means dividing both terms by their greatest common divisor (GCD) so the ratio is expressed in the smallest whole numbers. 24:36 simplifies to 2:3.
- Can I enter decimal or fractional values?
- Yes. For non-integer inputs the tool shows the ratio as-is and gives the decimal equivalent, since GCD is only defined for integers.
- How is a ratio different from a fraction?
- A ratio compares two quantities (a:b), while a fraction represents one part of a whole (a/b). They're numerically equivalent but used in different contexts.
- What is the aspect ratio 16:9 as a decimal?
- 16 ÷ 9 ≈ 1.7778. This is the standard widescreen display ratio used by most HD and 4K screens.
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