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| Standard Drill Sizes - Inches | ||||||||||||||||||
| Drill Size | Decimal Equiv. | . | Drill Size | Decimal Equiv. | . | Drill Size | Decimal Equiv. | . | Drill Size | Decimal Equiv. | . | Drill Size | Decimal Equiv. | |||||
| 80 | = | 0.0135 | . | 50 | = | 0.0700 | . | 22 | = | 0.1570 | . | 17/64 | = | 0.2656 | . | 1/2 | = | 0.5000 |
| 79 | = | 0.0145 | . | 49 | = | 0.0730 | . | 21 | = | 0.1590 | . | H | = | 0.2660 | . | 33/64 | = | 0.5156 |
| 1/64 | = | 0.0156 | . | 48 | = | 0.0760 | . | 20 | = | 0.1610 | . | I | = | 0.2720 | . | 17/32 | = | 0.5313 |
| 78 | = | 0.0160 | . | 5/64 | = | 0.0781 | . | 19 | = | 0.1660 | . | J | = | 0.2770 | . | 35/64 | = | 0.5469 |
| 77 | = | 0.0180 | . | 47 | = | 0.0785 | . | 18 | = | 0.1695 | . | K | = | 0.2810 | . | 9/16 | = | 0.5625 |
| 76 | = | 0.0200 | . | 46 | = | 0.0810 | . | 11/64 | = | 0.1719 | . | 9/32 | = | 0.2813 | . | 37/64 | = | 0.5781 |
| 75 | = | 0.0210 | . | 45 | = | 0.0820 | . | 17 | = | 0.1730 | . | L | = | 0.2900 | . | 19/32 | = | 0.5938 |
| 74 | = | 0.0225 | . | 44 | = | 0.0860 | . | 16 | = | 0.1770 | . | M | = | 0.2950 | . | 39/64 | = | 0.6094 |
| 73 | = | 0.0240 | . | 43 | = | 0.0890 | . | 15 | = | 0.1800 | . | 19/64 | = | 0.2969 | . | 5/8 | = | 0.6250 |
| 72 | = | 0.0250 | . | 42 | = | 0.0935 | . | 14 | = | 0.1820 | . | N | = | 0.3020 | . | 41/64 | = | 0.6406 |
| 71 | = | 0.0260 | . | 3/32 | = | 0.0938 | . | 13 | = | 0.1850 | . | 5/16 | = | 0.3125 | . | 21/32 | = | 0.6563 |
| 70 | = | 0.0280 | . | 41 | = | 0.0960 | . | 3/16 | = | 0.1875 | . | O | = | 0.3160 | . | 43/64 | = | 0.6719 |
| 69 | = | 0.0292 | . | 40 | = | 0.0980 | . | 12 | = | 0.1890 | . | P | = | 0.3230 | . | 11/16 | = | 0.6875 |
| 68 | = | 0.0310 | . | 39 | = | 0.0995 | . | 11 | = | 0.1910 | . | 21/64 | = | 0.3281 | . | 45/64 | = | 0.7031 |
| 1/32 | = | 0.0313 | . | 38 | = | 0.1015 | . | 10 | = | 0.1935 | . | Q | = | 0.3320 | . | 23/32 | = | 0.7188 |
| 67 | = | 0.0320 | . | 37 | = | 0.1040 | . | 9 | = | 0.1960 | . | R | = | 0.3390 | . | 47/64 | = | 0.7344 |
| 66 | = | 0.0330 | . | 36 | = | 0.1065 | . | 8 | = | 0.1990 | . | 11/32 | = | 0.3438 | . | 3/4 | = | 0.7500 |
| 65 | = | 0.0350 | . | 7/64 | = | 0.1094 | . | 7 | = | 0.2010 | . | S | = | 0.3480 | . | 49/64 | = | 0.7656 |
| 64 | = | 0.0360 | . | 35 | = | 0.1100 | . | 13/64 | = | 0.2031 | . | T | = | 0.3580 | . | 25/32 | = | 0.7813 |
| 63 | = | 0.0370 | . | 34 | = | 0.1110 | . | 6 | = | 0.2040 | . | 23/64 | = | 0.3594 | . | 51/64 | = | 0.7969 |
| 62 | = | 0.0380 | . | 33 | = | 0.1130 | . | 5 | = | 0.2055 | . | U | = | 0.3680 | . | 13/16 | = | 0.8125 |
| 61 | = | 0.0390 | . | 32 | = | 0.1160 | . | 4 | = | 0.2090 | . | 3/8 | = | 0.3750 | . | 53/64 | = | 0.8281 |
| 60 | = | 0.0400 | . | 31 | = | 0.1200 | . | 3 | = | 0.2130 | . | V | = | 0.3770 | . | 27/32 | = | 0.8438 |
| 59 | = | 0.0410 | . | 1/8 | = | 0.1250 | . | 7/32 | = | 0.2188 | . | W | = | 0.3860 | . | 55/64 | = | 0.8594 |
| 58 | = | 0.0420 | . | 30 | = | 0.1285 | . | 2 | = | 0.2210 | . | 25/64 | = | 0.3906 | . | 7/8 | = | 0.8750 |
| 57 | = | 0.0430 | . | 29 | = | 0.1360 | . | 1 | = | 0.2280 | . | X | = | 0.3970 | . | 57/64 | = | 0.8906 |
| 56 | = | 0.0465 | . | 28 | = | 0.1405 | . | A | = | 0.2340 | . | Y | = | 0.4040 | . | 29/32 | = | 0.9063 |
| 3/64 | = | 0.0469 | . | 9/64 | = | 0.1406 | . | 15/64 | = | 0.2344 | . | 13/32 | = | 0.4063 | . | 59/64 | = | 0.9219 |
| 55 | = | 0.0520 | . | 27 | = | 0.1440 | . | B | = | 0.2380 | . | Z | = | 0.4130 | . | 15/16 | = | 0.9375 |
| 54 | = | 0.0550 | . | 26 | = | 0.1470 | . | C | = | 0.2420 | . | 27/64 | = | 0.4219 | . | 61/64 | = | 0.9531 |
| 53 | = | 0.0595 | . | 25 | = | 0.1495 | . | D | = | 0.2460 | . | 7/16 | = | 0.4375 | . | 31/32 | = | 0.9688 |
| 1/16 | = | 0.0625 | . | 24 | = | 0.1520 | . | 1/4 (E) | = | 0.2500 | . | 29/64 | = | 0.4531 | . | 63/64 | = | 0.9844 |
| 52 | = | 0.0635 | . | 23 | = | 0.1540 | . | F | = | 0.2570 | . | 15/32 | = | 0.4688 | . | |||
| 51 | = | 0.0670 | . | 5/32 | = | 0.1563 | . | G | = | 0.2610 | . | 31/64 | = | 0.4844 | . | |||
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