What is the thickness of 10 gauge in inches or millimeters?

• A. 1/8 in or 3.416 mm
• B. 3/16 in or 4.76 mm
• C. 1/4 in or 6.35 mm
• D. 1/10 in or 2.54 mm

Answer: (A)

In sheet metal, gauge numbers map to standard thicknesses; for steel, 10 gauge is about 0.1345 inches thick, which is roughly 3.42 mm. The option that lists 3.416 mm matches that conversion (0.1345 in ≈ 3.417 mm), so it reflects the correct thickness for 10 gauge steel. The inch part of that option (1/8 in) is close but a bit off; the key is the thickness in inches and millimeters, and 0.1345 in equals about 3.416 mm. The other choices correspond to clearly thicker or thinner values (3/16 in = 4.76 mm, 1/4 in = 6.35 mm, 1/10 in = 2.54 mm).