½ Fraction Calculator

Add, subtract, multiply, and divide fractions. Results shown in simplified form with decimal equivalent.

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½ Fraction Calculator

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🔢 Simplify a Fraction

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Related Guide
How to Add, Subtract, Multiply and Divide Fractions
The rules for each operation, with worked examples.
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What is the Fraction Calculator?

The Fraction Calculator adds, subtracts, multiplies, and divides two fractions, and also simplifies any fraction to its lowest terms. Enter a numerator and denominator for each fraction, choose an operation, and it returns the answer as a simplified fraction, a mixed number, a decimal, and a percentage.

How to Use It

Type the numerator and denominator for each fraction into the boxes, pick addition, subtraction, multiplication, or division from the dropdown, and press Calculate. To reduce a single fraction instead, use the Simplify a Fraction box below — enter its numerator and denominator and press Simplify to get the lowest-terms result.

When to Use It

Use it to check homework on fraction arithmetic, to scale a recipe that uses fractional measurements, to split a quantity into fractional shares, or whenever you need a quick answer without working through common denominators or the greatest common divisor by hand.

Who Benefits

Students learning fraction rules, parents helping with math homework, and anyone doing measurements in cooking, woodworking, or sewing where fractional units are common. The mixed-number and decimal outputs make it easy to translate a result into whichever format you actually need.

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Frequently Asked Questions

To add fractions: find a common denominator, convert both fractions, then add the numerators. Example: 1/3 + 1/4 → common denominator is 12 → 4/12 + 3/12 = 7/12. This calculator handles it automatically.
Multiply numerator × numerator and denominator × denominator: (a/b) × (c/d) = (a×c)/(b×d). Example: 2/3 × 3/4 = 6/12 = 1/2. Always simplify the result by dividing by the GCD (greatest common divisor).
Divide both numerator and denominator by their GCD (Greatest Common Divisor). Example: 12/18 → GCD is 6 → 12÷6 / 18÷6 = 2/3. This calculator automatically simplifies all results to lowest terms.