Fraction Calculator

Put them over a common denominator, add the numerators, then reduce. For 1/2 + 1/3 the common denominator is 6, giving 3/6 + 2/6 = 5/6. The tool does all three steps and shows the reduced result.

Yes. Type the whole part, a space, then the fraction: 1 1/2. It’s converted to 3/2 internally, and if the answer isn’t whole you get it back as a mixed number too.

Multiply the numerators together and the denominators together: 2/3 × 3/4 = 6/12, which reduces to 1/2. Unlike addition, no common denominator is needed.

Multiply by the reciprocal (the flipped second fraction): 1/2 ÷ 1/4 = 1/2 × 4/1 = 4/2 = 2. Dividing by a fraction smaller than 1 makes the result larger.

Yes. Every result is divided by the greatest common divisor of its numerator and denominator, so you always get lowest terms — 6/12 comes back as 1/2, never 6/12.

Dividing by 0 (or by a fraction with a zero numerator) is undefined, so the tool shows an error rather than a result. Check that the second fraction isn’t zero.

Yes. Put the minus sign in front, like -3/4 or -1 1/2. The sign is tracked through the calculation and shown on the numerator of the answer.

The decimal is a quick sanity check and useful when you need to type the value elsewhere. It’s rounded to six places, so exact fractions like 1/8 show as 0.125 and repeating ones like 1/3 as 0.333333.

No. The arithmetic runs entirely in your browser; nothing is uploaded and analytics never receives the numbers.