Fraction Calculator | Free Add, Subtract, Multiply, Divide Tool
Add, subtract, multiply, and divide fractions with step-by-step solutions. Simplify fractions, compare them, convert between fractions and decimals, find fractions of numbers, and discover equivalent fractions — all with interactive visual pie charts.
📖 Want to understand your results?
Read our complete guide to the Fraction Calculator — with real-world examples, expert insights, and pro tips.
— Advertisement —
Below Result
Responsive
Slot: placeholder-calc-bottom-slot
How to Use the Fraction Calculator
Arithmetic
Add, subtract, multiply, or divide two fractions with mixed number support. See step-by-step solutions with LCD/GCD, plus visual pie charts of each fraction.
Simplify
Reduce any fraction to its lowest terms. We show the GCD (Greatest Common Divisor) and the division steps so you can learn how simplification works.
Compare
Compare two fractions side-by-side to see which is larger, smaller, or if they are equal. Visual pie charts make it easy to understand.
Convert
Convert between fractions and decimals instantly. See the equivalent percentage and a visual pie chart representation of the fraction.
Fraction of a Number
Calculate what a fraction of any number equals. For example: what is 2/3 of 60? Perfect for cooking, discounts, and splitting quantities.
Equivalent Fractions
Find any number of equivalent fractions by multiplying the numerator and denominator. Learn the pattern with a clear, visual display.
How to Add, Subtract, Multiply & Divide Fractions
Adding Fractions
- Find the LCM (Least Common Multiple) of the denominators
- Convert both fractions to equivalent fractions with the same denominator
- Add the numerators — the denominator stays the same
- Simplify the result to lowest terms
1/3 + 1/4 = 4/12 + 3/12 = 7/12
Subtracting Fractions
- Find the LCM of the denominators
- Convert both fractions to equivalent fractions with the same denominator
- Subtract the numerators — the denominator stays the same
- Simplify the result to lowest terms
3/4 - 1/3 = 9/12 - 4/12 = 5/12
Multiplying Fractions
- Multiply the numerators together
- Multiply the denominators together
- Simplify the result to lowest terms
- Tip: Cross-cancel before multiplying for smaller numbers
2/3 × 3/4 = 6/12 = 1/2
Dividing Fractions
- Keep the first fraction as is
- Flip the second fraction (find its reciprocal)
- Change the division sign to multiplication
- Multiply and simplify the result
1/2 ÷ 1/4 = 1/2 × 4/1 = 4/2 = 2
— Advertisement —
Content Mid
Responsive
Slot: placeholder-in-content-slot
Common Fraction, Decimal & Percentage Conversions
Quick reference chart showing the most commonly used fractions and their equivalents.
| Fraction | Decimal | Percentage |
|---|---|---|
| 1/10 | 0.10 | 10% |
| 1/8 | 0.125 | 12.5% |
| 1/5 | 0.20 | 20% |
| 1/4 | 0.25 | 25% |
| 1/3 | 0.3333 | 33.33% |
| 3/8 | 0.375 | 37.5% |
| 2/5 | 0.40 | 40% |
| 1/2 | 0.50 | 50% |
| 3/5 | 0.60 | 60% |
| 5/8 | 0.625 | 62.5% |
| 2/3 | 0.6667 | 66.67% |
| 3/4 | 0.75 | 75% |
| 4/5 | 0.80 | 80% |
| 5/6 | 0.8333 | 83.33% |
| 7/8 | 0.875 | 87.5% |
| 9/10 | 0.90 | 90% |
| 1/1 | 1.00 | 100% |
When to Use a Fraction Calculator
Cooking & Baking
Scaling recipes up or down requires adding and multiplying fractions. Our calculator handles 1/2, 1/3, 1/4, and all common measurements.
Construction
Measurements often involve fractions of an inch. Adding 3/8" + 1/4" gives 5/8" — our calculator handles it instantly.
Education
Students learning fraction arithmetic can check their work, see step-by-step solutions, and build confidence with visual pie charts.
Finance
Calculating percentages and proportions often involves fractions. Convert between fraction and decimal forms for investment and loan calculations.
DIY Projects
Cutting materials, mixing ratios for paint or concrete — our fraction calculator handles all the math so you can focus on building.
Data Analysis
Working with proportions, finding equivalent fractions, and understanding ratios is essential for data interpretation.
Reviewed by Emily Watson, M.Ed.
Mathematics EducatorMathematics teacher and curriculum designer with 15+ years of experience.
Fraction Calculator Pros & Cons
Pros
- ✅ All four operations (+, −, ×, ÷)
- ✅ Step-by-step simplification shown
- ✅ Visual pie chart for every result
- ✅ Free forever — no subscriptions
- ✅ Works offline after page load
Cons
- ✗ Two fractions at a time only
- ✗ No mixed number input support
Frequently Asked Questions
What is a fraction calculator?
A fraction calculator is an online tool that performs arithmetic operations on fractions. It can also simplify fractions, convert between fractions and decimals, find equivalent fractions, and calculate fractions of numbers.
How do you add fractions with different denominators?
To add fractions with different denominators: 1) Find the LCM of the denominators, 2) Convert both fractions to equivalent fractions with the LCM, 3) Add the numerators, 4) Simplify. Example: 1/3 + 1/4 = 4/12 + 3/12 = 7/12.
How do you divide fractions?
To divide fractions, multiply the first fraction by the reciprocal (flip) of the second fraction. Example: 1/2 ÷ 1/4 = 1/2 × 4/1 = 4/2 = 2.
How do you simplify a fraction?
To simplify a fraction, find the GCD of the numerator and denominator, then divide both by it. Example: 8/12 → GCD=4 → 8÷4/12÷4 = 2/3.
How do you convert a fraction to a decimal?
Divide the numerator by the denominator. Example: 3/4 = 3 ÷ 4 = 0.75. To convert to a percentage, multiply the decimal by 100. 3/4 = 75%.
What is an equivalent fraction?
Equivalent fractions represent the same value but have different numerators and denominators. Example: 1/2, 2/4, 3/6, and 4/8 are all equivalent.
Footer Banner
Responsive
Slot: placeholder-footer-slot