Fraction Calculator
Add, subtract, multiply, and divide fractions — simplified and as decimals.
How to Use
- Step 1: Enter the numerator and denominator for each fraction.
- Step 2: Select the operation: +, −, ×, or ÷.
- Step 3: The result updates instantly as a simplified fraction and decimal.
About Fraction Calculator
Working with fractions can be tricky, especially when simplifying or finding common denominators. This fraction calculator handles all four arithmetic operations — addition, subtraction, multiplication, and division — and automatically simplifies results to their lowest terms using the Euclidean GCD algorithm.
Results are displayed in two ways: as a simplified fraction (or mixed number when the result is greater than 1) and as a decimal equivalent. This makes it easy to switch between fraction and decimal representations depending on your need.
The tool is particularly useful for students learning fractions, teachers preparing examples, and anyone dealing with recipe scaling, measurement conversions, or engineering calculations that involve fractional quantities.
You may also find our Percentage Calculator and Scientific Calculator helpful.
Frequently Asked Questions
How are fractions simplified?
We use the Euclidean algorithm to find the GCD of the numerator and denominator, then divide both by it.
What is a mixed number?
A mixed number combines a whole number with a proper fraction, e.g. 1 1/2 instead of 3/2.
Can I enter negative fractions?
Yes — enter a negative numerator to represent a negative fraction.
What happens if the denominator is zero?
Division by zero is undefined. The calculator will show an Error in that case.
Are results exact?
Yes — the calculator works with integers, so all fraction results are mathematically exact before any decimal conversion.
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