By Zencalcy Editorial TeamLast reviewed About us
Combine two fractions with +, −, ×, or ÷. Every result is automatically reduced to lowest terms using the greatest common divisor, and division by zero fractions is blocked.
Add, subtract, multiply, and divide fractions with auto-reduction.
a/b + c/d = (ad + bc)/bd, then reduced by GCD
| Symbol | Meaning |
|---|---|
| a/b | First fraction |
| c/d | Second fraction |
1/2 + 1/3 = 5/6. 3/4 ÷ 2/5 = 15/8.
Continue with the Percentage Calculator, all math calculators, or browse the full calculator directory.
Yes — numerators and denominators must be integers; denominators cannot be zero.
Click to use the Absolute Value Calculator and get instant results.
Click to use the Basic Calculator and get instant results.
Click to use the Scientific Calculator and get instant results.
Click to use the Exponent Calculator and get instant results.
Click to use the Square Root Calculator and get instant results.
Click to use the Cube Root Calculator and get instant results.
Content updated: September 2026