Measurement calculator
Decimal to Fraction Calculator
Convert a decimal into the nearest common workshop fraction and see the rounding difference.
What the result means
The selected denominator controls the smallest fraction the calculator can use. A result rounded to 1/16 inch is easier to measure than one rounded to 1/128 inch, but it is also less precise.
Formula
The fractional part is multiplied by the selected denominator, rounded to the nearest whole numerator, then reduced.
Common mistakes
- Choosing more precision than the measuring tool can show.
- Treating the nearest fraction as an exact conversion.
- Ignoring the difference between the original decimal and the rounded fraction.
Before you use the result
This calculator performs the math using the information you enter. Check the measurements and make sure the result fits the actual project before cutting, drilling, buying materials, or putting anything into service.