FractionLab

Fraction Calculator

A free fraction calculator that works the way fractions actually work: in exact integer arithmetic, never floating-point approximations. Add, subtract, multiply, or divide any two fractions and the result comes back fully simplified — 1/3 + 1/4 is exactly 7/12, not a rounded decimal forced back into fraction form — alongside its mixed-number decomposition and a six-decimal display value. Two companion views convert any fraction to a decimal (and say whether that decimal terminates or repeats) and reduce any fraction to simplest form with the greatest common divisor. Everything calculates in your browser on the numbers you enter; nothing is uploaded or stored. Negative fractions are handled with the sign carried on the numerator, results past one are decomposed into mixed numbers automatically, and impossible inputs — a zero denominator, or dividing by a fraction equal to zero — are called out instead of returning a bogus number.