Fraction Calculator
Please enter valid numbers (denominators cannot be zero).
What Is a Fraction Calculator?
A fraction calculator performs arithmetic on fractions — addition, subtraction, multiplication, and division — and automatically simplifies the result to its lowest terms.
Formulas Used
Addition: a/b + c/d = (ad + bc) / bd
Subtraction: a/b − c/d = (ad − bc) / bd
Multiplication: a/b × c/d = ac / bd
Division: a/b ÷ c/d = ad / bc
The result is then simplified by dividing both the numerator and denominator by their greatest common factor (GCF).
How to Use This Calculator
Enter the numerator and denominator of your first fraction, choose an operation, then enter the numerator and denominator of your second fraction. Click "Calculate" to see the simplified result and its decimal equivalent.
Frequently Asked Questions
Does this calculator simplify the result automatically?
Yes, the result is always reduced to its simplest form using the greatest common factor.
Can I use negative numbers?
Yes, negative numerators or denominators are supported and handled correctly in the calculation.
What if my result is an improper fraction?
The calculator shows the simplified improper fraction along with its decimal equivalent, rather than converting to a mixed number.
Can I calculate with whole numbers?
Yes, enter the whole number as the numerator and use 1 as the denominator.