Gauge Converter

Gauge / Inch / mm / Drill Size Converter

B&S Millimeter (mm) Inch (decimal) Inch (fraction) Drill Size
0 8.5 0.325 21/64 —
1 7.34 0.289 9/32 —
2 6.52 0.257 1/4 —
3 5.81 0.229 7/32 1
4 5.18 0.204 13/64 6
5 4.62 0.182 3/16 15
6 4.11 0.162 5/32 20
7 3.66 0.144 9/64 27
8 3.25 0.128 1/8 30
9 2.9 0.114 — 34
10 2.59 0.102 — 38
11 2.31 0.091 3/32 43
12 2.06 0.081 5/64 46
13 1.83 0.072 — 50
14 1.63 0.064 1/16 51
15 1.45 0.057 — 52
16 1.3 0.051 — 54
17 1.14 0.045 3/64 55
18 1.02 0.04 — 56
19 0.914 0.036 — 60
20 0.812 0.032 1/32 —
21 0.711 0.028 — 67
22 0.635 0.025 — 70
23 0.558 0.022 — 71
24 0.508 0.02 — 74
25 0.457 0.018 — 75
26 0.406 0.016 1/64 77
27 0.355 0.014 — 78
28 0.304 0.012 — 79
29 0.279 0.011 — 80
30 0.254 0.01 — —