Math
Fraction Calculator for Add, Subtract, Multiply, and Divide
Add, subtract, multiply, and divide fractions with simplified results, improper fractions, and mixed number support.
Search intent guide
Use this page when you need a fast answer to fraction calculator
Use this fraction calculator when exact arithmetic matters more than rounded decimals. It is useful for schoolwork, measurement math, and any situation where mixed numbers, simplification, or improper fractions should stay in exact form.
Editorial review
Best for
- Adding, subtracting, multiplying, and dividing fractions
- Reducing fractions to simplest form
- Working with mixed numbers instead of decimal approximations
Before you start
- Enter numerator and denominator in the right order
- Keep exact fractions when rounding would affect the next step
- Use common denominators carefully when checking the result manually
Inputs
Work with two fractions and choose an operation.
Fraction A
Fraction B
Results
Reduced fraction and decimal form.
Fraction
5/6
Decimal
0.83
Mixed
0 5/6
Decimal to fraction
Fraction
1/2
Simplify a fraction
Reduced
3/4
Common fractions
| Fraction | Decimal | Percent |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.33 | 33.33% |
| 2/3 | 0.67 | 66.67% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
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How this Fraction Calculator works
Performs add, subtract, multiply, and divide on two fractions with optional mixed numbers. It reduces results, returns decimals, and converts decimal inputs to fractions.
Quick guide
Jump to the section you need, then return to the fraction calculator.
Best use cases
- Add, subtract, multiply, or divide classroom, recipe, measurement, and construction fractions quickly.
- Convert decimal values into reduced fractions when you need cleaner math or more readable ratios.
- Check mixed-number arithmetic before writing the final answer in homework or technical notes.
Inputs
- Fraction A numerator and denominator
- Fraction B numerator and denominator
- Optional whole number inputs for mixed numbers
- Selected operation (add, subtract, multiply, divide)
- Decimal value to convert to a fraction
Outputs
- Reduced fraction result
- Decimal form of the result
- Mixed number output
- Decimal to fraction conversion
Assumptions
- Denominators cannot be zero
- Results are reduced using greatest common divisor
Common mistakes
- Entering a zero denominator, which makes the fraction undefined before any operation starts.
- Forgetting that division by a fraction means multiplying by its reciprocal.
- Comparing raw numerators and denominators instead of using the reduced or decimal result for size checks.
Tips
- Reduce inputs first to avoid overflow
- Check for zero denominators before dividing
- Use decimal output for quick comparisons
Fraction Calculator formula guide
Use these fraction calculator formulas to audit the output or explain it to someone else.
3 formulas
Fraction Calculator examples
Review a ready-made fraction calculator scenario, copy it, then tweak inputs to match your case.
Example
Add fractions
Inputs
- Fraction A 1/2
- Fraction B 1/3
- Operation add
Outputs
- Result equals 5/6
- Decimal about 0.833
The calculator reduces the result automatically.
Example
Divide fractions
Inputs
- Fraction A 3/4
- Fraction B 2/5
- Operation divide
Outputs
- Result equals 15/8
- Decimal about 1.875
Dividing by a fraction multiplies by its reciprocal.
Common fractions
| Fraction | Decimal |
|---|---|
| 1/2 | 0.50 |
| 1/3 | 0.33 |
| 2/3 | 0.67 |
| 3/4 | 0.75 |
| 5/8 | 0.625 |
Decimals are rounded for quick comparison.
Decimal equivalents
Focus point
1/2
0.5
Position
#1 of 4
Original order
Share of total
19.67%
Total: 2.54
Use the chart to compare fraction sizes quickly.
References
- Basic fraction arithmetic
Learn more
Guides connected to the fraction calculator
Use these short guides when you want the decision framework behind the numbers, not just the raw output.
Category guide
Math Calculator Guide
Pick the right math calculator by problem type: arithmetic, ratios, coordinates, geometry, or measurement.
Directly related
Articles that mention this calculator
FAQ
Fraction Calculator FAQ
What does the Fraction Calculator do?
Performs add, subtract, multiply, and divide on two fractions with optional mixed numbers. It reduces results, returns decimals, and converts decimal inputs to fractions. It is part of our math toolkit.
When should I use this calculator?
Use it when you need to Add, subtract, multiply, or divide classroom, recipe, measurement, and construction fractions quickly. Convert decimal values into reduced fractions when you need cleaner math or more readable ratios.
What inputs do I need?
Typical inputs include Fraction A numerator and denominator, Fraction B numerator and denominator, Optional whole number inputs for mixed numbers.
How are the results calculated?
We follow the formulas and assumptions outlined in the "How this calculator works" section. You will see outputs like Reduced fraction result, Decimal form of the result, Mixed number output.
What mistakes should I avoid?
Common mistakes include Entering a zero denominator, which makes the fraction undefined before any operation starts. Forgetting that division by a fraction means multiplying by its reciprocal.
Can I share or download the results?
Use the Copy link or Print buttons to share your results. If a table or chart appears, you can download the data as CSV.
Is my data stored?
No. Calculations run in your browser and we do not store your inputs.
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