Fraction Calculator with Steps and Auto-Simplify
The Fraction Calculator adds, subtracts, multiplies, and divides any two fractions and reduces the answer to lowest terms automatically. Type the numerators and denominators, pick an operation, and the result appears instantly with its decimal equivalent.
It also handles mixed numbers like 2 1/3, shows the full step-by-step working when you want it, and includes converters for simplifying a fraction or switching between mixed and improper forms. It is built for students learning fraction arithmetic, teachers demonstrating each step, and anyone who needs a quick, accurate answer.
How to Use the Fraction Calculator
Enter the first fraction
Type the numerator (top number) and denominator (bottom number) of the first fraction into the left input box.
Choose an operation
Click an operation button — + (add), − (subtract), × (multiply), or ÷ (divide). The active operation stays highlighted.
Enter the second fraction
Fill in the numerator and denominator of the second fraction. To work with whole numbers like 2 1/3, tick Mixed number first to reveal a whole-number field for each side.
Read the result
The answer appears automatically, already reduced to lowest terms and paired with its decimal value. Turn on Show steps to see the full working, or tap Copy to grab the result.
Features
Four Arithmetic Operations
Add, subtract, multiply, and divide any two fractions with a single click on the operation buttons.
Automatic Simplification
Every result is reduced to lowest terms using the greatest common divisor, so 12/16 becomes 3/4 with no extra steps.
Mixed Number Support
Switch on Mixed number mode to enter values like 2 1/2; results display as mixed numbers when appropriate, with the decimal shown too.
Step-by-Step Solutions
Enable Show steps to see the original fractions, the common denominator (LCD), the calculation, and the final simplification.
Conversion Tools
The Converters panel reduces any fraction to its simplest form and switches between mixed and improper fractions, such as 2 1/3 and 7/3.
Live Calculation
Results update the instant you type — there is no calculate button to press, so it is easy to try different values quickly.
Swap, Clear, and Copy
Swap the two fractions to check subtraction order, clear all inputs for a fresh start, or copy the result to your clipboard.
Clean, Responsive Interface
Large inputs, clear fraction notation with division lines, highlighted results, dark mode, and a layout that adapts to mobile screens.
Frequently Asked Questions
How do I add fractions with different denominators?
Enter both fractions and click the + button. The calculator finds the least common denominator (LCD), converts both fractions, adds the numerators, and simplifies the result. Turn on Show steps to follow the process in detail.
How do you multiply and divide fractions?
To multiply, the calculator multiplies the numerators together and the denominators together, then simplifies. To divide, it multiplies the first fraction by the reciprocal of the second. Pick the × or ÷ button and the steps show exactly how it is done.
How do I simplify (reduce) a fraction?
Open the Converters panel and use Simplify Fraction: enter a numerator and denominator and it divides both by their greatest common divisor (GCD). For example, 24/36 reduces to 2/3. Calculator results are simplified for you automatically.
How do I convert a mixed number to an improper fraction?
Use the Mixed ↔ Improper converter. Enter a whole number with a fraction, such as 2 1/3, and it becomes 7/3. Leave the whole number blank to go the other way and turn an improper fraction back into a mixed number.
Can the calculator add 3 or more fractions?
It works with two fractions per calculation. To combine three or more, compute the first two, copy that result, and use it as one of the inputs in the next step — repeating until every fraction is included.
How do I add a fraction and a whole number?
Tick Mixed number to reveal a whole-number field for each side, then enter the whole number with a fraction of 0 over any denominator. Alternatively, write the whole number as a fraction over 1 — for example, 3 as 3/1.
Why doesn't my result show as a fraction?
When the answer is a whole number — for example 4/2 = 2 — it is shown as just the number. That is the simplest form, since the denominator reduces to 1.
Can I calculate with negative fractions?
Yes. Enter a negative value in the numerator and the calculator handles the sign correctly, showing the proper sign on the result. Division by zero stays undefined and displays a dash instead of an error.
Is my data saved anywhere?
No. All calculations happen directly in your browser. Nothing is sent to a server, nothing is stored, and your inputs are cleared when you close the page.
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