Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers. Simplifies results automatically. Free.
Add, subtract, multiply, and divide fractions. Results are automatically simplified to lowest terms. Supports mixed numbers (e.g., 1½) and improper fractions.
How fraction arithmetic works
To add or subtract fractions, you first find a common denominator, then operate on the numerators. To multiply, multiply numerators together and denominators together. To divide, flip the second fraction (take its reciprocal) and multiply. This calculator handles all of that automatically.
Simplifying fractions
A fraction is in simplest form when the numerator and denominator share no common factor other than 1. For example, 6/8 simplifies to 3/4 by dividing both by their GCD (2). The calculator always returns results in lowest terms.
Mixed numbers
A mixed number like 2¾ means 2 + 3/4 = 11/4 as an improper fraction. Enter it as "2 3/4" or convert it yourself. The calculator can work with both forms.
Fractions Explained: The Four Operations