How to use this calculator
Use the Fraction Calculator for arithmetic with two fractions. Results are simplified and shown as a decimal and mixed number when useful.
How the calculation works
- Enter two numerator and denominator pairs.
- Choose addition, subtraction, multiplication, or division.
- The calculator simplifies the result with the greatest common divisor.
Formula
Fraction addition: a/b + c/d = (ad + bc) / bd. Multiplication: a/b x c/d = ac / bd.
Example
1/2 + 1/3 = 5/6, which is about 0.833333.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- Denominators cannot be zero.
- Division by a fraction with zero numerator is not allowed.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.