Math calculator
Fraction Calculator
Add, subtract, multiply, or divide two fractions.
About the fraction calculator
The fraction calculator adds, subtracts, multiplies, or divides two fractions and simplifies the result.
How to use this calculator
- 1
Enter fractions
Enter the numerator and denominator for each fraction.
- 2
Choose operation
Select add, subtract, multiply, or divide.
- 3
View results
See the simplified fraction and decimal equivalent.
How the calculation works
Add/Sub: common denominator. Multiply: num×num / den×den. Divide: num×den₂ / den×num₂. Result simplified to lowest terms.
Example: 1/2 + 1/3 = 5/6.
When to use a calculator vs. mental math
Simple operations like percentages and proportions are great for mental math. Complex problems — quadratic equations, standard deviation, and base conversions — benefit from calculator precision. Always estimate the answer first to catch input errors, and verify results with a second method when possible.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, market conditions, or individual circumstances. Results are for planning purposes only — consult a qualified professional for regulated, medical, financial, or construction decisions.
Frequently asked questions about fraction calculator
How accurate is the fraction calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.