Drill Bit Sizes
Letter To Decimal
Wire Gauge to Decimal
Letter
Decimal
Z
0.413
Y
0.404
X
0.397
W
0.386
V
0.377
U
0.368
T
0.358
S
0.348
R
0.339
Q
0.332
p
0.323
O
0.316
N
0.302
M
0.295
L
0.290
K
0.281
J
0.277
I
0.272
H
0.266
G
0.261
F
0.257
E
0.250
D
0.246
C
0.242
B
0.238
A
0.234
This drill bit conversion table helps you poke the correct size hole into the material you're working on.