Mixed numbers combine a whole part and a fraction — like 2 1/3 cups of flour.
About this calculator
Mixed numbers combine a whole part and a fraction — like 2 1/3 cups of flour. Adding them means converting to improper fractions, finding a common denominator, then converting back.
Enter two mixed numbers and pick add or subtract. The answer shows both mixed form and the improper fraction for checking.
Common in recipes and primary school maths. Simplify results with the [[simplify-fractions]] calculator. Compare sizes using [[compare-fractions]]. Convert pieces to decimals via [[fraction-to-decimal]].
Common uses
- Add recipe quantities given as mixed measures
- Subtract mixed numbers for board exam practice
- Convert between mixed and improper forms
- Check homework where denominators differ
Frequently asked questions
What is 2 1/3 + 1 1/4?
3 7/12. Convert to 7/3 and 5/4, common denominator 12 gives 28/12 + 15/12 = 43/12 = 3 7/12.
How do you subtract mixed numbers with borrowing?
Convert to improper fractions first — borrowing is handled automatically when the second fraction is larger than the first fractional part.
Must denominators match before adding?
Not before converting to improper form, but you need a common denominator when adding the fractional parts.
Can whole parts be zero?
Yes. 0 1/2 is just one half. Enter whole as 0 and set numerator and denominator.