Calculators
Fraction Calculator
Add, subtract, multiply, or divide fractions with automatic simplification and decimal results locally in your browser.
Add, subtract, multiply, or divide two fractions with automatic simplification. All calculations run locally in your browser.
Perform arithmetic on fractions with automatic simplification.
This fraction calculator performs addition, subtraction, multiplication, and division of two fractions. It automatically simplifies the result to lowest terms and also shows the decimal equivalent. Enter whole numbers for numerators and denominators; denominators cannot be zero. The calculator uses exact arithmetic where possible and handles negative values with the sign on the numerator. All calculations stay in your browser.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
How does the fraction calculator work?
Enter two fractions with numerators and denominators, select an operation, and the calculator adds, subtracts, multiplies, or divides them. It simplifies the result to lowest terms and shows the decimal equivalent. For division, the second numerator cannot be zero.
Does it reduce fractions automatically?
Yes. Results are automatically reduced to lowest terms using the greatest common divisor. If the denominator becomes 1, only the numerator is displayed.
Can I use negative numbers in fractions?
Yes. Negative values are accepted for numerators and denominators. The calculator normalizes the sign so the negative sign appears on the numerator when appropriate.
Do my fraction values stay private?
Yes. All calculations run locally in your browser. CodeASystem does not upload or store the values you enter.