Half of 5/16 inches is 5/32 inches (0.15625″, 3.97 mm).
How to Calculate It
Convert 5/16 to an improper fraction, divide by 2, then simplify. 5/16 = 5/16, divided by 2 = 5/32, simplified to 5/32.
On the Tape Measure
The mark at 5/32 inches (0.15625″) is a 1/32-inch mark found on many professional tapes. If your tape does not show 32nds, use the decimal 0.15625 with a digital caliper.
To find half of any tape measure measurement, enter it in TapeMath and tap the Half It button. The result appears instantly on the visual tape.