What does this tool do?
The Fraction Calculator adds, subtracts, multiplies, or divides two fractions and automatically reduces the result to its simplest form. For students, teachers, and anyone working through a recipe or measurement, it instantly shows the answer as a simplified fraction, a decimal, and a mixed number.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
Simplification and result formats
Enter the numerator and denominator of each fraction, pick an operation (+, −, ×, ÷), and the result updates instantly. The tool divides by the greatest common divisor (GCD) to reduce the fraction, so 4/8 is shown as 1/2. You also see the same answer as a decimal to six places (0.5) and as a mixed number (like 1 1/2). The copy button grabs the simplified fraction in one tap so you can paste it into homework or notes.
Frequently asked questions
Can I add fractions with different denominators?
Yes. For addition and subtraction the tool cross-multiplies to find a common denominator automatically, so you don't have to align them by hand. For example, 1/2 + 1/3 becomes 5/6 directly.
How is the result shown as a mixed number?
When the numerator is larger than the denominator, the tool splits it into a whole part and a remainder, so 7/4 appears as 1 3/4. If the result is a whole number, only that integer is shown.
What happens if I divide by zero?
When a denominator is zero, or you divide by a fraction equal to zero, the decimal value is flagged as undefined because it is mathematically invalid.
Is Fraction Calculator free?
Yes. Fraction Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Fraction Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.