Decimal to Fraction Converter Online

If you're reading a CAD schematic that calls for a 0.375-inch hole, you'll stare at your drill bit box forever because bits are measured in fractions, not decimals. This calculator is built for makers, woodworkers, and machinists who need to instantly translate flat decimals into real-world fractional units.

The Greatest Common Divisor (GCD)

Simply converting 0.75 into 75/100 isn't helpful. The tool runs a mathematical GCD algorithm in the background to simplify the output. It finds the largest number that divides evenly into both the numerator and denominator, automatically reducing 75/100 down to a usable 3/4.

Mixed Number Logic

If you enter a number greater than 1, like 4.125, the script is smart enough to isolate the whole integer. Instead of returning an improper fraction like 33/8, it formats the result as a proper mixed number: 4 1/8, which is how you'd actually read it on a tape measure.

The Repeating Decimal Issue

One mathematical quirk to be aware of: irrational repeating decimals are tough for computers. If you want the fraction 1/3, you have to enter an exact mathematical approximation. If you type just 0.33, the tool will return 33/100. It only recognizes repeating thresholds if you provide enough decimal places.