EVERYDAY MATH · FREE INTERACTIVE CALCULATOR
Fraction Calculator
Add, subtract, multiply and divide two fractions. Change the inputs below to calculate a result immediately. No account required.
Sum
5/6Decimal
0.8333Product
0.1667Difference
0.1667Quotient
1.5How to calculate the answer
Use a common denominator to add or subtract. Multiply numerators and denominators for products.
Worked example
1/2 + 1/3 = 5/6.
For the example inputs shown above, the calculated results are:
| Sum | 5/6 |
|---|---|
| Decimal | 0.8333 |
| Product | 0.1667 |
| Difference | 0.1667 |
| Quotient | 1.5 |
How to interpret this result
A denominator of zero is not valid.
These figures illustrate the displayed method using the default inputs. Change the inputs to explore another case, and check units and conventions relevant to the problem.
Why simplifying matters
Fractions represent exact ratios. Simplifying by a common factor changes the appearance but not the value; converting to a decimal may introduce rounding.
Watch the denominator
The denominator may not be zero. When adding unlike fractions, first express both over a common denominator.
Related calculators
Frequently asked questions
How are fractions added?
Convert to a common denominator, add the numerators, then simplify.
What does simplify mean?
Divide numerator and denominator by their greatest common divisor.
Can the denominator be zero?
No. Division by zero is undefined.
Sources and further reading
Last updated: . Results are estimates for information only and are not financial, medical or professional advice.