Fraction Calculator
Enter values to calculate fraction with a clear result.
Calculate
Enter values and select Calculate.
How it works
For addition or subtraction: a/b ± c/d = (ad ± bc)/bd. For multiplication: (a/b) × (c/d) = ac/bd. For division: (a/b) ÷ (c/d) = ad/bc. Reduce by the greatest common divisor.
Worked examples
- 1/2 + 1/4: 3/4
- 2/3 × 3/4: 1/2
Frequently asked questions
Is this calculator free?
Yes. You can use it without paying or creating an account.
Does it work on a phone?
Yes. The page adapts to small and large screens.
Can I enter zero?
Where zero is mathematically valid, the calculator accepts it.
What happens if I enter an invalid value?
You will see a clear message explaining what to correct.
Does the calculation run in my browser?
Yes. The calculator runs with JavaScript on your device.
Related tools
Last updated: October 17, 2026