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Drill Bit Chart

Drill Bit Chart

Bit Size (in inches)
Decimals 
Bit Size (in inches)
Decimals
1/64
0.015625  
33/64
0.515625
1/32
0.03125  
17/32
0.53125
3/64
0.046875  
35/64
0.546875
1/16
0.0625  
9/16
0.5625
5/64
0.078125  
37/64
0.578125
3/32
0.09375  
19/32
0.59375
7/64
0.109375  
39/64
0.609375
1/8
0.125  
5/8
0.625
9/64
0.140625  
41/64
0.640625
5/32
0.15625  
21/32
0.65625
11/64
0.171875  
43/64
0.671875
3/16
0.1875  
11/16
0.6875
13/64
0.203125  
45/64
0.703125
7/32
0.21875  
23/32
0.71875
15/64
0.234375  
47/64
0.734375
1/4
0.250  
3/4
0.750
17/64
0.265625  
49/64
0.765625
9/32
0.28125  
25/32
0.78125
19/64
0.296875  
51/64
0.796875
5/16
0.3125  
13/16
0.8125
21/64
0.328125  
53/64
0.828125
11/32
0.34375  
27/32
0.84375
23/64
0.359375  
55/64
0.859375
3/8
0.375  
7/8
0.875
25/64
0.390625  
57/64
0.890625
13/32
0.40625  
29/32
0.90625
27/64
0.421875  
59/64
0.921875
7/16
0.4375  
15/16
0.9375
29/64
0.453125  
61/64
0.953125
15/32
0.46875  
31/32
0.96875
31/64
0.484375  
63/64
0.984375
1/2
0.500  
1
1.000