Fraction Calculator

Add, subtract, multiply, and divide fractions — fully simplified.

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What is a Fraction Calculator?

A fraction calculator performs arithmetic on fractions — numbers expressed as a numerator over a denominator — and returns a simplified result. Working with fractions by hand requires finding common denominators for addition and subtraction, or cross-multiplying for multiplication and division, and then reducing the result using the greatest common divisor. This tool handles all of that automatically, showing you the simplified fraction, its decimal equivalent, and whether it can be expressed as a mixed number.

Whether you're helping with homework, scaling a recipe, or solving an engineering problem, this calculator gives you accurate fraction arithmetic instantly. All calculations run in your browser — nothing is sent to any server.

How to Use

  1. Enter the numerator and denominator for the first fraction.
  2. Select the operation: addition (+), subtraction (−), multiplication (×), or division (÷).
  3. Enter the numerator and denominator for the second fraction.
  4. Click ✨ Calculate to see the simplified result, decimal value, and step-by-step working.

Frequently Asked Questions

To add fractions with different denominators, find the least common denominator (LCD), convert both fractions to have the LCD, then add the numerators. For example, 1/2 + 1/3: the LCD is 6, so 1/2 becomes 3/6 and 1/3 becomes 2/6. Adding gives 5/6. This calculator does all of this automatically.

Yes. Enter a negative sign in the numerator field for negative fractions. To enter a whole number, set the denominator to 1 (e.g., enter 5/1 for the whole number 5). The calculator handles all combinations correctly.

No. This tool runs entirely in your browser. Your input is never sent to any server, never logged, and never stored. Closing the tab removes all data immediately.
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