Six fraction calculators: add, subtract, multiply, and divide fractions; work with mixed numbers; simplify fractions; convert between decimals and fractions; and perform exact big-number fraction arithmetic using BigInt.
Enter numerators in the top boxes and denominators in the bottom boxes. Choose an operator and click Calculate.
Enter mixed numbers as whole numerator/denominator (e.g. -2 3/4, 3 5/7), plain fractions (5/7), or integers (10).
Reduce a fraction or mixed number to its simplest form using the Greatest Common Divisor (GCD). Choose the input type below.
Enter a decimal number (e.g. 1.375) to convert it to its exact simplified fraction.
Enter a fraction to convert it to its decimal equivalent (up to 10 significant digits).
Perform exact fraction arithmetic on very large integers. Uses JavaScript BigInt — results are mathematically exact regardless of number size.
Solve fraction problems instantly with our free fraction calculator. Add, subtract, multiply, or divide fractions and mixed numbers, with results automatically simplified.
Addition/subtraction requires a common denominator before combining numerators. Multiplication multiplies numerators and denominators directly. Division multiplies by the reciprocal of the second fraction. Results are simplified using the greatest common divisor.
Yes, mixed numbers (like 2 ½) are converted to improper fractions before calculating, then simplified back if needed.
Simplifying to lowest terms is standard mathematical convention and makes results easier to interpret and use.
Many fraction calculators include a decimal equivalent alongside the fraction result for convenience.
The calculator automatically finds a common denominator for addition and subtraction, you don't need to do this manually.