Fraction Calculator

To calculate fractions, identify the numerator (top number) and denominator (bottom number) of each fraction. For addition and subtraction, find a common denominator first, then perform the operation on the numerators. For multiplication, multiply numerators together and denominators together; for division, flip the second fraction and multiply. Our free fraction calculator handles all four operations instantly and returns a simplified result.

On most scientific calculators, use the fraction button (often labeled a b/c or n/d) to enter a numerator and denominator separately. On an online fraction calculator like this one, simply type the numerator and denominator for each fraction into the provided fields, select the operation (add, subtract, multiply, or divide), and click Calculate. The result is shown as a simplified fraction and, where applicable, a mixed number.

Google's built-in calculator supports basic fraction input by typing expressions like '1/2 + 1/3' directly into the search bar, and it will display a decimal result. However, it does not show step-by-step working or return a simplified proper fraction as the answer. For full fraction arithmetic with simplified outputs and mixed number support, a dedicated online fraction calculator is the better choice.

The best fraction calculator is one that supports all four operations — addition, subtraction, multiplication, and division — across proper fractions, improper fractions, and mixed numbers, and returns the answer in fully simplified form. Top-rated options include Calculator.net, Symbolab, and dedicated tools like this one, which also show step-by-step solutions so you can learn the process, not just get an answer.

To simplify a fraction, divide both the numerator and the denominator by their greatest common divisor (GCD). For example, 8/12 simplifies to 2/3 because the GCD of 8 and 12 is 4. Our fraction calculator automatically reduces every result to its lowest terms, so you always get the simplest form without any extra steps.

When adding or subtracting fractions with unlike denominators, you must first find the least common denominator (LCD) — the smallest number both denominators divide into evenly. Convert each fraction to an equivalent fraction using the LCD, then add or subtract the numerators while keeping the denominator the same. Finally, simplify the result. The fraction calculator on this page handles the LCD automatically, showing you the full working.

An improper fraction has a numerator larger than or equal to its denominator, such as 7/4. To convert it to a mixed number, divide the numerator by the denominator: the quotient becomes the whole number part and the remainder becomes the new numerator over the original denominator — so 7/4 becomes 1 3/4. This calculator automatically displays improper fraction results as mixed numbers so the answer is easy to read and use.