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Decimal equivalents

Fraction 1/64–1 in, number #80–#1, letter A–Z. Inch and mm side by side.
Lavigne Labs

Fractions 1/64 – 1 in

FractionInchmm
1/64⌀0.015625⌀0.397
1/32⌀0.03125⌀0.794
3/64⌀0.046875⌀1.191
1/16⌀0.0625⌀1.587
5/64⌀0.078125⌀1.984
3/32⌀0.09375⌀2.381
7/64⌀0.109375⌀2.778
1/8⌀0.125⌀3.175
9/64⌀0.140625⌀3.572
5/32⌀0.15625⌀3.969
11/64⌀0.171875⌀4.366
3/16⌀0.1875⌀4.762
13/64⌀0.203125⌀5.159
7/32⌀0.21875⌀5.556
15/64⌀0.234375⌀5.953
1/4⌀0.25⌀6.35
17/64⌀0.265625⌀6.747
9/32⌀0.28125⌀7.144
19/64⌀0.296875⌀7.541
5/16⌀0.3125⌀7.938
21/64⌀0.328125⌀8.334
11/32⌀0.34375⌀8.731
23/64⌀0.359375⌀9.128
3/8⌀0.375⌀9.525
25/64⌀0.390625⌀9.922
13/32⌀0.40625⌀10.319
27/64⌀0.421875⌀10.716
7/16⌀0.4375⌀11.112
29/64⌀0.453125⌀11.509
15/32⌀0.46875⌀11.906
31/64⌀0.484375⌀12.303
1/2⌀0.5⌀12.7
FractionInchmm
33/64⌀0.515625⌀13.097
17/32⌀0.53125⌀13.494
35/64⌀0.546875⌀13.891
9/16⌀0.5625⌀14.287
37/64⌀0.578125⌀14.684
19/32⌀0.59375⌀15.081
39/64⌀0.609375⌀15.478
5/8⌀0.625⌀15.875
41/64⌀0.640625⌀16.272
21/32⌀0.65625⌀16.669
43/64⌀0.671875⌀17.066
11/16⌀0.6875⌀17.462
45/64⌀0.703125⌀17.859
23/32⌀0.71875⌀18.256
47/64⌀0.734375⌀18.653
3/4⌀0.75⌀19.05
49/64⌀0.765625⌀19.447
25/32⌀0.78125⌀19.844
51/64⌀0.796875⌀20.241
13/16⌀0.8125⌀20.637
53/64⌀0.828125⌀21.034
27/32⌀0.84375⌀21.431
55/64⌀0.859375⌀21.828
7/8⌀0.875⌀22.225
57/64⌀0.890625⌀22.622
29/32⌀0.90625⌀23.019
59/64⌀0.921875⌀23.416
15/16⌀0.9375⌀23.812
61/64⌀0.953125⌀24.209
31/32⌀0.96875⌀24.606
63/64⌀0.984375⌀25.003
1⌀1⌀25.4

Number drills #80 – #1

NumberInchmm
#80⌀0.0135⌀0.343
#79⌀0.0145⌀0.368
#78⌀0.016⌀0.406
#77⌀0.018⌀0.457
#76⌀0.02⌀0.508
#75⌀0.021⌀0.533
#74⌀0.0225⌀0.571
#73⌀0.024⌀0.61
#72⌀0.025⌀0.635
#71⌀0.026⌀0.66
#70⌀0.028⌀0.711
#69⌀0.0292⌀0.742
#68⌀0.031⌀0.787
#67⌀0.032⌀0.813
#66⌀0.033⌀0.838
#65⌀0.035⌀0.889
#64⌀0.036⌀0.914
#63⌀0.037⌀0.94
#62⌀0.038⌀0.965
#61⌀0.039⌀0.991
NumberInchmm
#60⌀0.04⌀1.016
#59⌀0.041⌀1.041
#58⌀0.042⌀1.067
#57⌀0.043⌀1.092
#56⌀0.0465⌀1.181
#55⌀0.052⌀1.321
#54⌀0.055⌀1.397
#53⌀0.0595⌀1.511
#52⌀0.0635⌀1.613
#51⌀0.067⌀1.702
#50⌀0.07⌀1.778
#49⌀0.073⌀1.854
#48⌀0.076⌀1.93
#47⌀0.0785⌀1.994
#46⌀0.081⌀2.057
#45⌀0.082⌀2.083
#44⌀0.086⌀2.184
#43⌀0.089⌀2.261
#42⌀0.0935⌀2.375
#41⌀0.096⌀2.438
NumberInchmm
#40⌀0.098⌀2.489
#39⌀0.0995⌀2.527
#38⌀0.1015⌀2.578
#37⌀0.104⌀2.642
#36⌀0.1065⌀2.705
#35⌀0.11⌀2.794
#34⌀0.111⌀2.819
#33⌀0.113⌀2.87
#32⌀0.116⌀2.946
#31⌀0.12⌀3.048
#30⌀0.1285⌀3.264
#29⌀0.136⌀3.454
#28⌀0.1405⌀3.569
#27⌀0.144⌀3.658
#26⌀0.147⌀3.734
#25⌀0.1495⌀3.797
#24⌀0.152⌀3.861
#23⌀0.154⌀3.912
#22⌀0.157⌀3.988
#21⌀0.159⌀4.039
NumberInchmm
#20⌀0.161⌀4.089
#19⌀0.166⌀4.216
#18⌀0.1695⌀4.305
#17⌀0.173⌀4.394
#16⌀0.177⌀4.496
#15⌀0.18⌀4.572
#14⌀0.182⌀4.623
#13⌀0.185⌀4.699
#12⌀0.189⌀4.801
#11⌀0.191⌀4.851
#10⌀0.1935⌀4.915
#9⌀0.196⌀4.978
#8⌀0.199⌀5.055
#7⌀0.201⌀5.105
#6⌀0.204⌀5.182
#5⌀0.2055⌀5.22
#4⌀0.209⌀5.309
#3⌀0.213⌀5.41
#2⌀0.221⌀5.613
#1⌀0.228⌀5.791

Letter drills A – Z

LetterInchmm
A⌀0.234⌀5.944
B⌀0.238⌀6.045
C⌀0.242⌀6.147
D⌀0.246⌀6.248
E⌀0.25⌀6.35
F⌀0.257⌀6.528
G⌀0.261⌀6.629
H⌀0.266⌀6.756
I⌀0.272⌀6.909
J⌀0.277⌀7.036
K⌀0.281⌀7.137
L⌀0.29⌀7.366
M⌀0.295⌀7.493
LetterInchmm
N⌀0.302⌀7.671
O⌀0.316⌀8.026
P⌀0.323⌀8.204
Q⌀0.332⌀8.433
R⌀0.339⌀8.611
S⌀0.348⌀8.839
T⌀0.358⌀9.093
U⌀0.368⌀9.347
V⌀0.377⌀9.576
W⌀0.386⌀9.804
X⌀0.397⌀10.084
Y⌀0.404⌀10.262
Z⌀0.413⌀10.49
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