Fraction Calculator
Add, subtract, multiply, or divide two fractions and reduce the result.
Use whole numbers or fractions such as 3/4. Numerators and denominators may each have up to 15 digits.
Data handling
Storage and export controls
- Retention
- The tool's working state is kept only while this page is open. Inputs and results are not saved to persistent storage by Got A Tool.
- Export
- The tool may prepare a result after you run it. It downloads or copies it only when you choose that action.
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How it works
Fraction Calculator: a practical guide
A fraction calculator adds, subtracts, multiplies, or divides two whole numbers or fractions and reduces the result. It keeps the primary result as a fraction so you can inspect its exact numerator and denominator instead of relying only on a rounded decimal.
- STEP 01
Enter a whole number or a fraction such as 3/4 in each value field.
- STEP 02
Choose add, subtract, multiply, or divide.
- STEP 03
Calculate to review the reduced fraction and its decimal approximation.
What this tool does and its limits
Fractions are reduced by dividing their numerator and denominator by their greatest common divisor. A negative denominator is normalized to a negative numerator. This tool accepts only simple fractions, not mixed numbers, percentages, decimals, expressions, or unit conversions. Division by zero is rejected rather than guessed.
Inputs, selected files, and results stay in your browser. The tool does not upload them to Got A Tool or save them to persistent storage.
Questions
Fraction Calculator details
Can I enter a whole number?
Yes. Enter 5 to treat it as 5/1.
Can I enter a negative fraction?
Yes. Enter -3/4 or 3/-4; the displayed result places any negative sign in the numerator.
Why is the decimal different from the fraction?
The fraction is the exact reduced result. The decimal display is rounded for readability and may not terminate.
Can I enter a mixed number such as 1 1/2?
No. Convert it to an improper fraction such as 3/2 before entering it.
Keep working
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