Fraction Calculator

The fraction calculator adds, subtracts, multiplies, or divides two fractions and returns a simplified result, a mixed number when that is more useful, and a decimal equivalent for comparison. It accepts proper fractions, improper fractions, mixed numbers, and whole numbers, so you do not need to convert anything by hand before entering it. Students use it to check homework answers on fraction operations that require finding a common denominator or simplifying with the greatest common divisor. Cooks and bakers use it to scale a recipe up or down, for example halving a quantity written as a mixed number. Because every step happens instantly in the browser, it also works as a fast way to verify a manual calculation before submitting an assignment.

Students learning fraction arithmetic use it to check their own work on addition, subtraction, multiplication, and division problems, especially ones that need a common denominator or simplification. Teachers use it to quickly verify answers when marking assignments or preparing worked examples for a lesson. Cooks and bakers use it to scale recipe quantities that are written as fractions, such as adjusting 3/4 cup for a different batch size. Woodworkers, sewists, and other hobbyists who measure in fractional inches use it to add or subtract measurements without converting to decimals first. Anyone who prefers exact fractional answers over rounded decimals, for precision or for showing working, benefits from a tool that keeps the math in fraction form throughout.

Proper fractions like 3/4, improper fractions like 7/3, mixed numbers like 1 2/3, and whole numbers like 5.

Yes. Results are reduced with the greatest common divisor so 2/4 becomes 1/2.

A mixed number combines a whole number and a proper fraction, for example 1 1/2 instead of 3/2.

No. Fraction maths runs entirely in your browser.

You can enter negative signs. The tool normalizes the sign onto the numerator in the simplified result.