Add, subtract, multiply, and divide fractions with simplified results
Enter two fractions and click Calculate
Calculate the Greatest Common Divisor and Least Common Multiple
Calculate percentages, percentage of a number, and percentage change
Solve ratios, find missing values, and simplify ratios with visual breakdown
Full-featured scientific calculator with trigonometry, logarithms, and history
Fraction Calculator is a free online tool for performing arithmetic operations on fractions: addition, subtraction, multiplication, and division. Enter two fractions, select the operation, and get the result as a simplified fraction, decimal, and mixed number. The tool automatically reduces fractions to their simplest form by dividing both the numerator and denominator by their greatest common divisor. It also shows the calculation steps so you can understand the process. This calculator is ideal for students learning fractions, teachers creating examples, and anyone who needs quick fraction arithmetic. All calculations run in your browser.
Addition: a/b + c/d = (ad + bc) / bd Subtraction: a/b - c/d = (ad - bc) / bd Multiplication: a/b x c/d = ac / bd Division: a/b / c/d = ad / bc Simplification: divide numerator and denominator by GCD Mixed number: whole = floor(|numerator| / denominator), remainder = |numerator| mod denominator