What is Fraction Calculator?
Fraction Calculator is an online tool for performing arithmetic operations with fractions. Whether you need to add, subtract, multiply, or divide fractions, this calculator handles it all with automatic simplification and step-by-step explanations.
Four Operations
Add (+), subtract (−), multiply (×), and divide (÷) any two fractions
Auto Simplify
Results are automatically reduced to lowest terms (e.g., 6/8 becomes 3/4)
Mixed Numbers
Work with mixed numbers like 2 1/3 or convert between mixed and improper fractions
Show Steps
View the complete calculation process to understand how the answer was derived
Who Is This For?
Students
Teachers
Parents
Anyone
Your Data Stays Private
All calculations happen entirely in your browser:
- No server processing - Numbers are never sent anywhere
- No tracking - We don't collect your calculation history
- Instant results - Calculations happen immediately as you type
- 1. What is Fraction Calculator?
- 2. How to Use Fraction Calculator
- 3. Features
- 4. Frequently Asked Questions
- 4.1. How do I add fractions with different denominators?
- 4.2. What is a mixed number?
- 4.3. Why doesn't my result show as a fraction?
- 4.4. What does "simplify" mean?
- 4.5. Can I calculate with negative fractions?
- 4.6. What happens if I divide by zero?
- 4.7. Is my data saved anywhere?
- 4.8. Can I use this on my phone?
- 4.9. What is an improper fraction?
How to Use Fraction Calculator
Basic Calculation
Enter the first fraction
Type the numerator (top number) and denominator (bottom number) in the first input box
Select an operation
Click one of the operation buttons: + (add), − (subtract), × (multiply), or ÷ (divide)
Enter the second fraction
Type the numerator and denominator in the second input box
View the result
The answer appears automatically, already simplified to lowest terms
Using Mixed Numbers
Enable Mixed Number mode
Check the "Mixed number" checkbox at the top
Enter the whole number
A new input field appears for the whole number part
Enter the fraction part
Fill in the numerator and denominator as usual
Viewing Calculation Steps
Enable Show steps
Check the "Show steps" checkbox below the calculator
Review each step
The calculator displays:
- Original fractions
- Finding common denominators (for addition/subtraction)
- The calculation process
- Simplification to lowest terms
Using Converters
Click the Converters section to access additional tools:
Simplify Fraction
Mixed ↔ Improper
Quick Actions
- Swap - Exchange the two fractions (useful for checking subtraction order)
- Clear - Reset all inputs to start a new calculation
- Copy - Copy the result to your clipboard
Features
Four Arithmetic Operations
Perform all basic fraction operations with a single click:
Addition (+)
Subtraction (−)
Multiplication (×)
Division (÷)
Automatic Simplification
Every result is automatically reduced to its simplest form. The calculator finds the Greatest Common Divisor (GCD) and divides both numerator and denominator, so 12/16 becomes 3/4 without any extra steps.
Mixed Number Support
Toggle mixed number mode to work with numbers like 2 1/2 instead of 5/2. Results are displayed in mixed number format when appropriate, along with the decimal equivalent.
Step-by-Step Solutions
Enable "Show steps" to see exactly how the calculation is performed:
- Original fractions displayed
- Common denominator found (LCD)
- Equivalent fractions calculated
- Operation performed
- Result simplified
Conversion Tools
The Converters section provides additional utilities:
Input
24/36
Output
2/3 (reduced by GCD)
Mixed
2 1/3
Improper
7/3
Live Calculation
Results update instantly as you type—no need to press a calculate button. This makes it easy to experiment with different values and see how they affect the result.
Clean, Modern Interface
The calculator features a visually clear design with:
- Large, easy-to-read inputs
- Clear fraction notation with division lines
- Highlighted results with decimal equivalents
- Dark mode support for comfortable viewing
Frequently Asked Questions
How do I add fractions with different denominators?
Simply enter both fractions and click the + button. The calculator automatically finds the Least Common Denominator (LCD), converts both fractions, adds the numerators, and simplifies the result. Enable "Show steps" to see this process in detail.
What is a mixed number?
A mixed number combines a whole number with a fraction, like 2 1/3 (two and one-third). To use mixed numbers, enable the "Mixed number" checkbox, which adds an input field for the whole number part.
Why doesn't my result show as a fraction?
When the result is a whole number (like 4/2 = 2), it's displayed as just the number without a fraction. This is the simplified form since any number divided by 1 equals itself.
What does "simplify" mean?
Simplifying (or reducing) a fraction means dividing both the numerator and denominator by their Greatest Common Divisor (GCD). For example, 6/8 simplifies to 3/4 because both 6 and 8 are divisible by 2.
Can I calculate with negative fractions?
Yes, simply enter a negative number in the numerator. The calculator handles negative values correctly and displays the appropriate sign in the result.
What happens if I divide by zero?
Division by zero is undefined in mathematics. If you enter 0 as a denominator or try to divide by a fraction equal to zero, the calculator displays "-" instead of an error.
Is my data saved anywhere?
No. All calculations happen directly in your browser using JavaScript. No data is sent to any server, and nothing is stored or tracked. When you close the page, all your inputs are cleared.
Can I use this on my phone?
Yes, the calculator is fully responsive and works on mobile devices. The layout adjusts to fit smaller screens while keeping all functionality accessible.
What is an improper fraction?
An improper fraction has a numerator larger than or equal to its denominator, like 7/3. Use the "Mixed ↔ Improper" converter to switch between improper fractions and mixed numbers (7/3 = 2 1/3).
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