Convert a decimal inch to the nearest fraction (e.g. 0.375 = 3/8") and back — for woodworking, machining and construction.
Numbers • inches
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On a US tape measure, inches are divided into halves, quarters, eighths, sixteenths and thirty-seconds. Converting a decimal inch to the nearest fraction — 0.625" = 5/8" — is essential for woodworking, machining, carpentry and DIY.
This converter rounds any decimal inch to the closest common fraction and converts fractions back to decimals, so you can move between calculator/CAD numbers and the markings printed on your ruler.