About Fraction Calculator
Fractions represent exact parts of a whole using a numerator and denominator.
Add, subtract, multiply and divide exact fractions. Use this page alongside your notes to check the process, then change the inputs to explore a different example.
How to use Fraction Calculator
- Review the input labels and replace the sample values with your own details.
- Check the units, options and any grading rules. The method below explains this tool’s assumptions.
- Use the action button to generate your result. Review it before copying, downloading or printing.
Method and assumptions
Enter integer numerators and nonzero integer denominators. Addition/subtraction uses a common denominator; multiplication multiplies numerators and denominators; division inverts the second fraction. Results are reduced by the HCF.
Worked example
1/2 + 1/3 = 3/6 + 2/6 = 5/6.
Enter this example above, then change one input and compare the result. This helps you see which part of the method responds to the change.
Understanding your result
Read the main answer first, then review any supporting values, units or messages. An input warning means you should correct the relevant field and run the tool again.
For a useful comparison, change one input at a time and record both results. Avoid rounding intermediate values when checking calculations by hand.
Tips and common mistakes
- Adding denominators directly is incorrect; use a common denominator.
- Recheck the example and input format if a result is unexpected.
- Keep a downloaded copy of work you want to reuse. Reloading the page resets your session.
Frequently asked questions
Can I divide by a zero fraction?
No. Its reciprocal is undefined.
Do I need an account?
No. Use the tool directly in your browser. Inputs are kept in the current page session, so download useful work before leaving.
Can I save or print my result?
Use Copy result, Download text or Print at the bottom of Your Result. Flashcards and quizzes export their source content for reuse; citations export your edited text.