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Drill Bit Size Chart

Ever need to know what the nearest metric (MM) size of bit is to your english (IN) one?  Do you have to drill a 7 millimeter (MM) hole but don't have a metric bit and want to know what english one will be closest?  Want to know what tap is needed for a particular sized hole?

Well, here's the chart you need!  Just look up what you have or need in the chart below...

 

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Inches

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Metric (MM) English (IN) Designation Tap and Pilot Information
.3429 .0135 #80
.3683 .0145 #79
.3969 .015625 1/64 #0 Pilot, Soft-Wood
.4064 .016 #78
.4572 .018 #77
.5 .0197
.508 .02 #76
.5334 .021 #75
.5715 .0225 #74
.6096 .024 #73
.635 .025 #72
.6604 .026 #71
.7112 .028 #70
.74168 .0292 #69
.75 .0295 M1x.25 coarse
.7874 .031 #68
.7938 .03125 1/32 #0 Pilot, Hard-Wood #1 Pilot, Hard & Soft-Wood #2 Pilot, Soft-Wood
.8128 .032 #67
.8382 .033 #66
.85 .0335 M1.1x.25 coarse
.889 .035 #65
.9144 .036 #64
.9398 .037 #63
.95 .0374 M1.2x.25 coarse
.9652 .038 #62
.9906 .039 #61
1 .0394
1.016 .04 #60
1.0414 .041 #59
1.0668 .042 #58
1.0922 .043 #57
1.1 .0433 M1.4x.3 coarse
1.1811 .0465 #56
1.1906 .046875 3/64 #0-80 UNF #2 Pilot, Hard-wood #3 Pilot, Soft-Wood #4 Pilot, Soft-Wood
1.25 .0492 M1.6x.35 coarse
1.3 .0512 M1.7x.35 coarse
1.3208 .052 #55
1.397 .055 #54
1.45 .0571 M1.8x.35 coarse
1.5 .0591
1.5113 .0595 #53 #1-64 UNC #1-72 UNF
1.5875 .0625 1/16 #0 Wood Shank Hole #3 Pilot, Hardwood #4 Pilot, Hardwood #5 Pilot, Softwood #6 Pilot, Softwood #7 Pilot, Softwood
1.6 .063 M2x.4 coarse
1.6129 .0635 #52
1.7018 .067 #51
1.75 .0689 M2.2x.45 coarse
1.778 .07 #50 #2-64 UNF #2-56 UNC
1.8542 .073 #49
1.9304 .076 #48
1.9844 .078125 5/64 #1 Wood Shank Hole #5 Pilot, Hard-wood #6 Pilot, Hard-wood #8 Pilot, Soft-wood #9 Pilot, Soft-wood
1.9939 .0785 #47 #3-48 UNC
2 .0787
2.05 .0807 M2.5x.45 coarse
2.0574 .081 #46
2.0828 .082 #45 #3-56 UNF
2.1844 .086 #44
2.2606 .089 #43 #4-40 UNC
2.3749 .0935 #42 #4-48 UNF
2.3813 .09375 3/32 #2 Wood Shank Hole #7 Pilot, Hard-wood #8 Pilot, Hard-wood #10 Pilot, Soft-wood #11 Pilot, Soft-wood
2.4384 .096 #41
2.4892 .098 #40
2.5 .0984 M3x.5 coarse
2.5273 .0995 #39
2.5781 .1015 #38 #5-40 UNC
2.6416 .104 #37 #5-44 UNF
2.7051 .1065 #36 #6-32 UNC
2.7781 .109375 7/64 #3 Wood Shank Hole #4 Wood Shank Hole #9 Pilot, Hard-wood #10 Pilot, Hard-wood #12 Pilot, Soft-wood #14 Pilot, Soft-wood
2.794 .11 #35
2.8194 .111 #34
2.8702 .113 #33 #6-40 UNF
2.9 .1142 M3.5x.6 coarse
2.9464 .116 #32
3 .1181
3.048 .12 #31
3.175 .125 1/8 #5 Wood Shank Hole #11 Pilot, Hard-wood #12 Pilot, Hard-wood
3.2639 .1285 #30
3.3 .1299 M4x.7 coarse
3.4544 .136 #29 #8-32 UNC #8-36 UNF
3.5 .1378 M4x.5 Fine
3.5687 .1405 #28
3.5719 .140625 9/64 #6 Wood Shank Hole #14 Pilot, Hard-wood #16 Pilot, Soft-wood #18 Pilot, Soft-wood
3.6 .1417 M4x.35 Fine
3.6576 .144 #27
3.7 .1457 M4.5x.75 coarse
3.7338 .147 #26
3.7973 .1495 #25 #10-24 UNC
3.8608 .152 #24
3.9116 .154 #23
3.9688 .15625 5/32 #7 Wood Shank Hole #16 Pilot, Hard-wood
3.9878 .157 #22
4 .1575
4.0386 .159 #21 #10-32 UNF
4.0894 .161 #20
4.2 .1654 M5x.8 coarse
4.2164 .166 #19
4.3053 .1695 #18
4.3656 .171875 11/64 #8 Wood Shank Hole #20 Pilot, Soft-wood
4.3942 .173 #17 #12-24 UNC
4.4958 .177 #16
4.5 .1772 M5x.5 Fine
4.572 .18 #15 #12-28 UNF
4.6228 .182 #14
4.699 .185 #13
4.7625 .1875 3/16 #9 Wood Shank Hole #10 Wood Shank Hole #18 Pilot, Hard-wood
4.8006 .189 #12
4.8514 .191 #11
4.9149 .1935 #10
4.9784 .196 #9
5 .1969 M6x1 coarse
5.0546 .199 #8
5.1054 .201 #7 +"-20 UNC
5.1594 .203125 13/64 #11 Wood Shank Hole #20 Pilot, Hard-wood
5.1816 .204 #6
5.2197 .2055 #5
5.25 .2067 M6x.75 Fine
5.3086 .209 #4
5.4102 .213 #3 +"-28 UNF
5.5 .2165 M6x.5 Fine
5.5563 .21875 7/32 #12 Wood Shank Hole
5.6134 .221 #2
5.7912 .228 #1
5.9436 .234 A
5.9531 .234375 15/64
6 .2362 M7x1 coarse
6.0452 .238 B
6.1468 .242 C
6.2484 .246 D 1/16"-27 NPT
6.25 .2461 M7x.75 Fine
6.35 .25 1/4 #14 Wood Shank Hole
6.35 .25 E
6.5 .2559
6.5278 .257 F 5/16"-18 UNC
6.6294 .261 G
6.7469 .265625 17/64 #16 Wood Shank Hole
6.7564 .266 H
6.8 .2677 M8x1.25 coarse
6.9088 .272 I 5/16"-24 UNF
7 .2756 M8x.5 Fine
7.0358 .277 J
7.1374 .281 K
7.1438 .28125 9/32
7.25 .2854 M8x.75 Fine
7.366 .29 L
7.493 .295 M
7.5 .2953 M8x1 Fine
7.5406 .296875 19/64 #18 Wood Shank Hole
7.6708 .302 N
7.8 .3071 M9x1.25 coarse
7.9375 .3125 5/16 3/8"-16 UNC
8 .315 M9x1 Fine
8.0264 .316 O
8.2042 .323 P
8.3344 .328125 21/64 #20 Wood Shank Hole
8.4328 .332 Q 3/8"-24 UNF
8.5 .3346 M10x1.5 coarse
8.6106 .339 R 1/8"-27 NPT
8.7313 .34375 11/32
8.8 .3465 M10x1.25 Fine
8.8392 .348 S
9 .3543 M10x1 Fine
9.0932 .358 T 7/16"-14 UNC
9.1281 .359375 23/64
9.25 .3642 M10x.75 Fine
9.3472 .368 U
9.5 .374 M11x1.5 coarse
9.525 .375 3/8
9.5758 .377 V
9.8044 .386 W
9.9219 .390625 25/64 7/16"-20 UNF
10 .3937 M11x1 Fine
10.0838 .397 X
10.2 .4016 M12x1.75 coarse
10.2616 .404 Y
10.3188 .40625 13/32
10.4902 .413 Z
10.5 .4134 M12x1.5 Fine
10.7156 .421875 27/64 +"-13 UNC
11 .4331 M12x1 Fine
11.1125 .4375 7/16 +"-18 NPT
11.25 .4429 M12x.75 Fine
11.5 .4528
11.5094 .453125 29/64 +"-20 UNF
11.9063 .46875 15/32
12 .4724 M14x2 coarse
12.3031 .484375 31/64 9/16"-12 UNC
12.5 .4921 M14x1.5 Fine
12.7 .5 1/2
12.8 .5039 M14x1.25 Fine
13 .5118 M14x1 Fine
13.0969 .515625 33/64 9/16"-18 UNF
13.4938 .53125 17/32 5/8"-11 UNC
13.5 .5315
13.8906 .546875 35/64
14 .5512 M16x2 coarse
14.2875 .5625 9/16 5/8"-18 UNF
14.5 .5709 M16x1.5 Fine
14.6844 .578125 37/64 3/8"-18 NPT
15 .5906 M16x1 Fine
15.0813 .59375 19/32
15.4781 .609375 39/64
15.5 .6102 M18x2.5 coarse
15.875 .625 5/8
16 .6299 M18x2 Fine
16.2719 .640625 41/64 +"-10 UNC
16.5 .6496
16.6688 .65625 21/32
17 .6693 M18x1 Fine
17.0656 .671875 43/64
17.4625 .6875 11/16 +"-16 UNF
17.5 .689 M20x2.5 coarse
17.8594 .703125 45/64 +"-14 NPT
18 .7087 M20x2 Fine
18.2563 .71875 23/32
18.5 .7283 M20x1.5 Fine
18.6531 .734375 47/64
19 .748 M20x1 Fine
19.05 .75 3/4
19.4469 .765625 49/64 7/8"-9 UNC
19.5 .7677 M22x2.5 coarse
19.8438 .78125 25/32
20 .7874 M22x2 Fine
20.2406 .796875 51/64
20.5 .8071 M22x1.5 Fine
20.6375 .8125 13/16 7/8"-14 UNF
21 .8268 M24x3 coarse M22x1 Fine
21.0344 .828125 53/64
21.4313 .84375 27/32
21.5 .8465
21.8281 .859375 55/64
22 .8661 M24x2 Fine
22.225 .875 7/8 1"-8 UNC
22.5 .8858 M24x1.5 Fine
22.6219 .890625 57/64
23 .9055
23.0188 .90625 29/32 1"-12 UNF
23.4156 .921875 59/64 +"-14 NPT
23.5 .9252
23.8125 .9375 15/16
24 .9449 M27x3 coarse
24.2094 .953125 61/64
24.5 .9646 M26x1.5 Fine
24.6063 .96875 31/32
25 .9843 M27x2 Fine
25.0031 .984375 63/64 1-1/8"-7 UNC
25.4 1.000 1
25.5 1.0039 M27x1.5 Fine
26.5 1.0433 M30x3.5 coarse
26.5 1.0433 M28x1.5 Fine
26.5906 1.046875 1-3/64 1-1/8"-12 UNF
26.9875 1.0625 1-1/16
28 1.1024 M30x2 Fine
28.1781 1.109375 1-7/64 1+"-7 UNC
28.5 1.122 M30x1.5 Fine
28.575 1.125 1-1/8
29.3688 1.15625 1-5/32 1"-11+ NPT
29.5 1.1614 M33x3.5 coarse
29.7656 1.171875 1-11/64 1+"-12 UNF
30.1625 1.1875 1-3/16
31 1.2205 M33x2 Fine
32 1.2598 M36x4 coarse
33 1.2992 M36x3 Fine
34.1313 1.34375 1-11/32 1+"-6 UNC
34.925 1.375 1-3/8
35 1.378 M39x4 coarse
36 1.4173 M39x3 Fine
36.1156 1.421875 1-27/64 1+"-12 UNF
36.5125 1.4375 1-7/16
38.1 1.5 1+ 1+"-11+ NPT
39.2906 1.546875 1-35/64 1+"-5 UNC
39.6875 1.5625 1-9/16
41.275 1.625 1-5/8
42.4656 1.671875 1-43/64 1+"-12 UNF
44.0531 1.734375 1-47/64 1+"-11+ NPT
44.45 1.75 1-3/4
45.2438 1.78125 1-25/32 2"-4+ UNC
46.0375 1.8125 1-13/16
47.625 1.875 1-7/8
48.8156 1.921875 1-59/64 2"-12 UNF
49.2125 1.9375 1-15/16
56.3563 2.21875 2-7/32 2"-11+ NPT
66.675 2.625 2-5/8 2+-8 NPT
82.55 3.25 3+ 3"-8 NPT
88.9 3.5 3+ 3+"-8 NPT
107.95 4.25 4+ 4"-8 NPT

 

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