How to Convert 10mm to Inches
10 mm ÷ 25.4 = 0.3937 inches. To find the nearest 32nd, multiply by 32: 0.3937 × 32 = 12.6, which rounds to 13/32.
On a Tape Measure
Standard US tape measures show marks at every 1/16 inch. The nearest mark to 10mm is the 3/8″ mark. For rough layout work, use the 3/8″ mark.