Updated: July 2026
What is Fraction Calculator
The Fraction Calculator is a free online tool that adds, subtracts, multiplies and divides fractions, always delivering a simplified result. Whether you are a student trying to understand your math homework or a parent helping your child study, the tool was designed to work like a free private teacher: instead of just giving you the ready-made answer, it shows you step by step for each calculation.
In addition to the numerical result, the calculator draws a visual representation in the shape of a pie for each fraction, which is very helpful for those learning the concept for the first time. When the result is an improper fraction, with the numerator greater than the denominator, the tool also shows the version as a mixed number, which is the format most frequently asked in school tests.
How to use the Fraction Calculator
- Choose the desired operation: addition (+), subtraction (−), multiplication (×) or division (÷).
- Enter the numerator and denominator of the first fraction.
- Enter the numerator and denominator of the second fraction.
- See the simplified result appear automatically, along with the decimal version and, when applicable, the mixed number.
- Scroll down to follow the complete step-by-step guide on the board and understand exactly how the calculation was made.
Step by step and factoring
To add or subtract, the calculator finds the common denominator by multiplying the two denominators and adjusts the numerators using the butterfly method. To multiply, she multiplies numerator by numerator and denominator by denominator. To divide, she keeps the first fraction and multiplies it by the inverse of the second. In all cases, the final result is simplified by dividing the numerator and denominator by the greatest common divisor between them, so that the answer always comes in the smallest form possible.