Free Fraction Calculator — Add, Subtract & Divide Online
Add, subtract, multiply, and divide fractions instantly — results shown as simplified fractions and decimals, right in your browser.
Result
—
How it works
Enter first fraction
Type the numerator and denominator of the first fraction.
Choose operation
Select add, subtract, multiply, or divide.
Enter second fraction
Type the numerator and denominator of the second fraction.
Get simplified result
The answer appears as a simplified fraction and decimal instantly.
Common use cases
Homework help
Quickly check fraction arithmetic answers for maths homework or exam prep.
Cooking and recipes
Double or halve recipe ingredients expressed as fractions like 3/4 cup.
Carpentry & measurements
Add fractional measurements like 5/8" and 3/4" when cutting materials.
Teaching fractions
Demonstrate fraction operations step-by-step to students or children.
Frequently asked questions
How does fraction simplification work?
The calculator divides both numerator and denominator by their Greatest Common Divisor (GCD), giving the fraction in its lowest terms.
What if the denominator is zero?
Division by zero is undefined. The calculator will show an error if you enter 0 as a denominator.
Can I use negative fractions?
Yes — enter a negative numerator (e.g. -3) to represent a negative fraction like -3/4.
How are mixed numbers handled?
Convert mixed numbers to improper fractions first. For example, 1½ becomes 3/2.
Is the calculator free?
Yes, completely free with no signup or account needed.
Does it send data to a server?
No — all calculations run in your browser using JavaScript. Nothing is transmitted.