| Drill Bit Conversion Charts |
|---|
| FRACTION | DECIMAL | WIRE No. | METRIC |
|---|
| – | 0.0098 | – | 0.25 |
| – | 0.0118 | – | 0.3 |
| – | 0.0135 | 80 | – |
| – | 0.0138 | – | 0.35 |
| – | 0.0145 | 79 | – |
| 1/64 | 0.0156 | – | – |
| – | 0.0157 | – | 0.4 |
| – | 0.016 | 78 | – |
| – | 0.0177 | – | 0.45 |
| – | 0.018 | 77 | – |
| – | 0.0197 | – | 0.5 |
| – | 0.02 | 76 | – |
| – | 0.021 | 75 | – |
| – | 0.0217 | – | 0.55 |
| – | 0.0225 | 74 | – |
| – | 0.0236 | – | 0.6 |
| – | 0.024 | 73 | – |
| – | 0.025 | 72 | – |
| – | 0.0256 | – | 0.65 |
| – | 0.026 | 71 | – |
| – | 0.0276 | – | 0.7 |
| – | 0.028 | 70 | – |
| – | 0.0292 | 69 | – |
| – | 0.0295 | – | 0.75 |
| – | 0.031 | 68 | – |
| 1/32 | 0.0313 | – | – |
| – | 0.0315 | – | 0.8 |
| – | 0.032 | 67 | – |
| – | 0.033 | 66 | – |
| – | 0.0335 | – | 0.85 |
| – | 0.035 | 65 | – |
| – | 0.0354 | – | 0.9 |
| – | 0.036 | 64 | – |
| – | 0.037 | 63 | – |
| – | 0.0374 | – | 0.95 |
| – | 0.038 | 62 | – |
| – | 0.039 | 61 | – |
| – | 0.0394 | – | 1 |
| – | 0.04 | 60 | – |
| – | 0.041 | 59 | – |
| – | 0.042 | 58 | – |
| – | 0.043 | 57 | – |
| – | 0.0433 | – | 1.1 |
| – | 0.0465 | 56 | – |
| 3/64 | 0.0469 | – | – |
| – | 0.0472 | – | 1.2 |
| – | 0.0512 | – | 1.3 |
| – | 0.052 | 55 | – |
| – | 0.055 | 54 | – |
| – | 0.0551 | – | 1.4 |
| – | 0.0591 | – | 1.5 |
| – | 0.0595 | 53 | – |
| 1/16 | 0.0625 | – | – |
| – | 0.063 | – | 1.6 |
| – | 0.0635 | 52 | – |
| – | 0.0669 | – | 1.7 |
| – | 0.067 | 51 | – |
| – | 0.07 | 50 | – |
| – | 0.0709 | – | 1.8 |
| – | 0.073 | 49 | – |
| – | 0.0748 | – | 1.9 |
| – | 0.076 | 48 | – |
| 5/64 | 0.0781 | – | – |
| – | 0.0785 | 47 | – |
| – | 0.0787 | – | 2 |
| – | 0.081 | 46 | – |
| – | 0.082 | 45 | – |
| – | 0.0827 | – | 2.1 |
| – | 0.086 | 44 | – |
| – | 0.0866 | – | 2.2 |
| – | 0.089 | 43 | – |
| – | 0.0906 | – | 2.3 |
| – | 0.0935 | 42 | – |
| 3/32 | 0.0938 | – | – |
| – | 0.0945 | – | 2.4 |
| – | 0.096 | 41 | – |
| – | 0.098 | 40 | – |
| – | 0.0984 | – | 2.5 |
| – | 0.0995 | 39 | – |
| – | 0.1015 | 38 | – |
| – | 0.1024 | – | 2.6 |
| – | 0.104 | 37 | – |
| – | 0.1063 | – | 2.7 |
| – | 0.1065 | 36 | – |
| 7/64 | 0.1094 | – | – |
| – | 0.11 | 35 | – |
| – | 0.1102 | – | 2.8 |
| – | 0.111 | 34 | – |
| – | 0.113 | 33 | – |
| – | 0.1142 | – | 2.9 |
| – | 0.116 | 32 | – |
| – | 0.1181 | – | 3 |
| – | 0.12 | 31 | – |
| 1/8 | 0.125 | – | – |
| – | 0.1285 | 30 | – |
| – | 0.136 | 29 | – |
| – | 0.1378 | – | 3.5 |
| – | 0.1405 | 28 | – |
| 9/64 | 0.1406 | – | – |
| – | 0.144 | 27 | – |
| – | 0.147 | 26 | – |
| – | 0.1495 | 25 | – |
| – | 0.152 | 24 | – |
| – | 0.154 | 23 | – |
| 5/32 | 0.1563 | – | – |
| – | 0.157 | 22 | – |
| – | 0.1575 | – | 4 |
| – | 0.159 | 21 | – |
| – | 0.161 | 20 | – |
| – | 0.166 | 19 | – |
| – | 0.1695 | 18 | – |
| 11/64 | 0.1719 | – | – |
| – | 0.173 | 17 | – |
| – | 0.177 | 16 | – |
| – | 0.1772 | – | 4.5 |
| – | 0.18 | 15 | – |
| – | 0.182 | 14 | – |
| – | 0.185 | 13 | – |
| 3/16 | 0.1875 | – | – |
| – | 0.189 | 12 | – |
| – | 0.191 | 11 | – |
| – | 0.1935 | 10 | – |
| – | 0.196 | 9 | – |
| – | 0.1968 | – | 5 |
| – | 0.199 | 8 | – |
| – | 0.201 | 7 | – |
| 13/64 | 0.2031 | – | – |
| – | 0.204 | 6 | – |
| – | 0.2055 | 5 | – |
| – | 0.209 | 4 | – |
| – | 0.213 | 3 | – |
| – | 0.2165 | – | 5.5 |
| 7/32 | 0.2188 | – | – |
| – | 0.221 | 2 | – |
| – | 0.228 | 1 | – |
| – | 0.234 | A | – |
| 15/64 | 0.2344 | – | – |
| – | 0.2362 | – | 6 |
| – | 0.238 | B | – |
| – | 0.242 | C | – |
| – | 0.246 | D | – |
| 1/4 | 0.25 | E | – |
| – | 0.2559 | – | 6.5 |
| – | 0.257 | F | – |
| – | 0.261 | G | – |
| 17/64 | 0.2656 | – | – |
| – | 0.266 | H | – |
| – | 0.272 | I | – |
| – | 0.2756 | – | 7 |
| – | 0.277 | J | – |
| – | 0.281 | K | – |
| 9/32 | 0.2813 | – | – |
| – | 0.29 | L | – |
| – | 0.295 | M | – |
| – | 0.2953 | – | 7.5 |
| 19/64 | 0.2969 | – | – |
| – | 0.302 | N | – |
| 5/16 | 0.3125 | – | – |
| – | 0.315 | – | 8 |
| – | 0.316 | O | – |
| – | 0.323 | P | – |
| 21/64 | 0.3281 | – | – |
| – | 0.332 | Q | – |
| – | 0.3346 | – | 8.5 |
| – | 0.339 | R | – |
| 11/32 | 0.3438 | – | – |
| – | 0.348 | S | – |
| – | 0.3543 | – | 9 |
| – | 0.358 | T | – |
| 23/64 | 0.3594 | – | – |
| – | 0.368 | U | – |
| – | 0.374 | – | 9.5 |
| 3/8 | 0.375 | – | – |
| – | 0.377 | V | – |
| – | 0.386 | W | – |
| 25/64 | 0.3906 | – | – |
| – | 0.3937 | – | 10 |
| – | 0.397 | X | – |
| – | 0.404 | Y | – |
| 13/32 | 0.4063 | – | – |
| – | 0.413 | Z | – |
| – | 0.4134 | – | 10.5 |
| 27/64 | 0.4219 | – | – |
| – | 0.4331 | – | 11 |
| 7/16 | 0.4375 | – | – |
| 0.4528 | – | 11.5 |
| 29/64 | 0.4531 | – | – |
| 15/32 | 0.4688 | – | – |
| – | 0.4724 | – | 12 |
| 31/64 | 0.4844 | – | – |
| – | 0.4921 | – | 12.5 |
| 1/2 | 0.5 | – | – |
| – | 0.5118 | – | 13 |
| 33/64 | 0.5156 | – | – |
| 17/32 | 0.5313 | – | – |
| – | 0.5315 | – | 13.5 |
| 35/64 | 0.5469 | – | – |
| – | 0.5512 | – | 14 |
| 9/16 | 0.5625 | – | – |
| – | 0.5709 | – | 14.5 |
| 37/64 | 0.5781 | – | – |
| – | 0.5905 | – | 15 |
| 19/32 | 0.5938 | – | – |
| 39/64 | 0.6094 | – | – |
| – | 0.6102 | – | 15.5 |
| 11/16 | 0.625 | – | – |
| – | 0.6299 | – | 16 |
| 41/64 | 0.6406 | – | – |
| – | 0.6496 | – | 16.5 |
| 21/32 | 0.6563 | – | – |
| – | 0.6693 | – | 17 |
| 43/64 | 0.6719 | – | – |
| 3/4 | 0.6875 | – | – |
| – | 0.689 | – | 17.5 |
| 45/64 | 0.7031 | – | – |
| – | 0.7087 | – | 18 |
| 23/32 | 0.7188 | – | – |
| – | 0.7283 | – | 18.5 |
| 47/64 | 0.7344 | – | – |
| – | 0.748 | – | 19 |
| 3/4 | 0.75 | – | – |
| 49/64 | 0.7656 | – | – |
| – | 0.7677 | – | 19.5 |
| 25/32 | 0.7813 | – | – |
| – | 0.7874 | – | 20 |
| 51/64 | 0.7969 | – | – |
| – | 0.8071 | – | 20.5 |
| 13/16 | 0.8125 | – | – |
| – | 0.8268 | – | 21 |
| 53/64 | 0.8281 | – | – |
| 27/32 | 0.8438 | – | – |
| – | 0.8465 | – | 21.5 |
| 55/64 | 0.8594 | – | – |
| – | 0.8661 | – | 22 |
| 7/8 | 0.875 | – | – |
| – | 0.8858 | – | 22.5 |
| 57/64 | 0.8906 | – | – |
| – | 0.9055 | – | 23 |
| 29/32 | 0.9063 | – | – |
| 59/64 | 0.9219 | – | – |
| – | 0.9252 | – | 23.5 |
| 15/16 | 0.9375 | – | – |
| – | 0.9449 | – | 24 |
| 61/64 | 0.9531 | – | – |
| – | 0.9646 | – | 24.5 |
| 31/32 | 0.9688 | – | – |
| – | 0.9842 | – | 25 |
| 63/64 | 0.9844 | – | – |
| 1 | 1 | – | – |
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