About the Inch Fraction Calculator
Working with inch fractions is a daily reality for carpenters, woodworkers, plumbers, and other tradespeople. Tape measures are marked in fractions of an inch, typically down to 1/16" or 1/32", and accurately converting between decimal measurements and fractional inches is critical for precise cuts and fits. This calculator handles the most common conversions you encounter on a job site.
The Decimal to Fraction mode lets you convert any decimal inch value to the nearest fraction at your chosen precision. For example, 0.375" converts exactly to 3/8", while 0.4" rounds to 13/32" at 1/32" precision. The Fraction to Decimal mode works in reverse, giving you the exact decimal equivalent of any fractional measurement.
The Add and Subtract modes are especially useful when you need to combine or offset measurements. Instead of manually finding common denominators on the job site, enter your two fractional measurements and get an instant, reduced result. All fractions are automatically reduced to their simplest form for easy reading on your tape measure.