Mathlean · Online math workspace
Decimal to fraction calculator
Convert a finite decimal into a supported rational representation.
How to use this calculator
Edit Rationalize(0.125); the result is 1/8.
Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.
Try it here
Interactive tools require JavaScript. You can read the guide and example without it.
What to know
A rounded measurement is not made exact merely by expressing its decimal as a fraction.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.