Drill Chart imperial/metric
April 11, 2012, 9:55 pmArticle Summary
Eldar Gerfanov (Admin)
April 11, 2012, 9:55 pm
Eldar Gerfanov (Admin)
November 26, 2021, 12:16 am
16734
Public
Author Summary
Wed October 29, 2025, 5:16 pm
Wed October 29, 2025, 5:16 pm
| FRACTION INCH | NUMBER SIZE | LETTER SIZE | DECIMAL METRIC | DECIMAL INCHES |
| FRACTION INCH | NUMBER SIZE | LETTER SIZE | DECIMAL METRIC | DECIMAL INCHES |
| 80 | 0.0135 | |||
| 79 | 0.0145 | |||
| 1/64 | 0.0156 | |||
| 78 | 0.0160 | |||
| 77 | 0.0180 | |||
| 0.5 | 0.0197 | |||
| 76 | 0.0200 | |||
| 75 | 0.0210 | |||
| 74 | 0.0225 | |||
| 73 | 0.0240 | |||
| 72 | 0.0250 | |||
| 71 | 0.0260 | |||
| 70 | 0.0280 | |||
| 69 | 0.0292 | |||
| 0.75 | 0.0295 | |||
| 68 | 0.0310 | |||
| 1/32 | 0.0312 | |||
| 67 | 0.0320 | |||
| 66 | 0.0330 | |||
| 65 | 0.0350 | |||
| 64 | 0.0360 | |||
| 63 | 0.0370 | |||
| 62 | 0.0380 | |||
| 61 | 0.0390 | |||
| 1 | 0.0394 | |||
| 60 | 0.0400 | |||
| 59 | 0.0410 | |||
| 58 | 0.0420 | |||
| 57 | 0.0430 | |||
| 56 | 0.0465 | |||
| 3/64 | 0.0469 | |||
| 1.25 | 0.0492 | |||
| 55 | 0.0520 | |||
| 54 | 0.0550 | |||
| 1.5 | 0.0591 | |||
| 53 | 0.0595 | |||
| 1/16 | 0.0625 | |||
| 52 | 0.0635 | |||
| 51 | 0.0670 | |||
| 1.75 | 0.0689 | |||
| 50 | 0.0700 | |||
| 49 | 0.0730 | |||
| 48 | 0.0760 | |||
| 5/64 | 0.0781 | |||
| 47 | 0.0785 | |||
| 2 | 0.0787 | |||
| 46 | 0.0810 | |||
| 45 | 0.0820 | |||
| 44 | 0.0860 | |||
| 2.25 | 0.0886 | |||
| 43 | 0.0890 | |||
| 42 | 0.0935 | |||
| 3/32 | 0.0938 | |||
| 41 | 0.0960 | |||
| 40 | 0.0980 | |||
| 2.5 | 0.0984 | |||
| 39 | 0.0995 | |||
| 38 | 0.1015 | |||
| 37 | 0.1040 | |||
| 36 | 0.1065 | |||
| 2.75 | 0.1083 | |||
| 7/64 | 0.1094 | |||
| 35 | 0.1100 | |||
| 34 | 0.1110 | |||
| 33 | 0.1130 | |||
| 32 | 0.1160 | |||
| 3 | 0.1181 | |||
| 31 | 0.1200 | |||
| 1/8 | 0.1250 | |||
| 3.25 | 0.1280 | |||
| 30 | 0.1285 | |||
| 29 | 0.1360 | |||
| 3.5 | 0.1378 | |||
| 28 | 0.1405 | |||
| 9/64 | 0.1406 | |||
| 27 | 0.1440 | |||
| 26 | 0.1470 | |||
| 3.75 | 0.1476 | |||
| 25 | 0.1495 | |||
| 24 | 0.1520 | |||
| 23 | 0.1540 | |||
| 5/32 | 0.1562 | |||
| 22 | 0.1570 | |||
| 4 | 0.1575 | |||
| 21 | 0.1590 | |||
| 20 | 0.1610 | |||
| 19 | 0.1660 | |||
| 4.25 | 0.1673 | |||
| 18 | 0.1695 | |||
| 11/64 | 0.1719 | |||
| 17 | 0.1730 | |||
| 16 | 0.1770 | |||
| 4.5 | 0.1772 | |||
| 15 | 0.1800 | |||
| 14 | 0.1820 | |||
| 13 | 0.1850 | |||
| 4.75 | 0.1870 | |||
| 3/16 | 0.1875 | |||
| 12 | 0.1890 | |||
| 11 | 0.1910 | |||
| 10 | 0.1935 | |||
| 9 | 0.1960 | |||
| 5 | 0.1969 | |||
| 8 | 0.1990 | |||
| 7 | 0.2010 | |||
| 13/64 | 0.2031 | |||
| 6 | 0.2040 | |||
| 5 | 0.2055 | |||
| 5.25 | 0.2067 | |||
| 4 | 0.2090 | |||
| 3 | 0.2130 | |||
| 5.5 | 0.2165 | |||
| 7/32 | 0.2188 | |||
| 2 | 0.2210 | |||
| 5.75 | 0.2264 | |||
| 1 | 0.2280 | |||
| A | 0.2340 | |||
| 15/64 | 0.2344 | |||
| 6 | 0.2362 | |||
| B | 0.2380 | |||
| C | 0.2420 | |||
| D | 0.2460 | |||
| 6.25 | 0.2461 | |||
| 1/4 | E | 0.2500 | ||
| 6.5 | 0.2559 | |||
| F | 0.2570 | |||
| G | 0.2610 | |||
| 17/64 | 0.2656 | |||
| 6.75 | 0.2657 | |||
| H | 0.2660 | |||
| I | 0.2720 | |||
| 7 | 0.2756 | |||
| J | 0.2770 | |||
| K | 0.2810 | |||
| 9/32 | 0.2812 | |||
| 7.25 | 0.2854 | |||
| L | 0.2900 | |||
| M | 0.2950 | |||
| 7.5 | 0.2953 | |||
| 19/64 | 0.2969 | |||
| N | 0.3020 | |||
| 7.75 | 0.3051 | |||
| 5/16 | 0.3125 | |||
| 8 | 0.3150 | |||
| O | 0.3160 | |||
| P | 0.3230 | |||
| 8.25 | 0.3248 | |||
| 21/64 | 0.3281 | |||
| Q | 0.3320 | |||
| 8.5 | 0.3346 | |||
| R | 0.3390 | |||
| 11/32 | 0.3438 | |||
| 8.75 | 0.3445 | |||
| S | 0.3480 | |||
| 9 | 0.3543 | |||
| T | 0.3580 | |||
| 23/64 | 0.3594 | |||
| 9.25 | 0.3642 | |||
| U | 0.3680 | |||
| 9.5 | 0.3740 | |||
| 3/8 | 0.3750 | |||
| V | 0.3770 | |||
| 9.75 | 0.3839 | |||
| W | 0.3860 | |||
| 25/64 | 0.3906 | |||
| 10 | 0.3937 | |||
| X | 0.3970 | |||
| Y | 0.4040 | |||
| 13/32 | 0.4063 | |||
| Z | 0.4130 | |||
| 10.5 | 0.4134 | |||
| 27/64 | 0.4219 | |||
| 11 | 0.4331 | |||
| 7/16 | 0.4375 | |||
| 11.5 | 0.4528 | |||
| 29/64 | 0.4531 | |||
| 15/32 | 0.4688 | |||
| 12 | 0.4724 | |||
| 31/64 | 0.4844 | |||
| 12.5 | 0.4921 | |||
| 1/2 | 0.5000 | |||
| 13 | 0.5118 | |||
| 33/64 | 0.5156 | |||
| 17/32 | 0.5312 | |||
| 13.5 | 0.5315 | |||
| 35/64 | 0.5469 | |||
| 14 | 0.5512 | |||
| 9/16 | 0.5625 | |||
| 14.5 | 0.5709 | |||
| 37/64 | 0.5781 | |||
| 15 | 0.5906 | |||
| 19/32 | 0.5938 | |||
| 39/64 | 0.6094 | |||
| 15.5 | 0.6102 | |||
| 5/8 | 0.6250 | |||
| 16 | 0.6299 | |||
| 41/64 | 0.6406 | |||
| 16.5 | 0.6496 | |||
| 21/32 | 0.6562 | |||
| 17 | 0.6693 | |||
| 43/64 | 0.6719 | |||
| 11/16 | 0.6875 | |||
| 17.5 | 0.6890 | |||
| 45/64 | 0.7031 | |||
| 18 | 0.7087 | |||
| 23/32 | 0.7188 | |||
| 18.5 | 0.7283 | |||
| 47/64 | 0.7344 | |||
| 19 | 0.7480 | |||
| 3/4 | 0.7500 | |||
| 49/64 | 0.7656 | |||
| 19.5 | 0.7677 | |||
| 25/32 | 0.7813 | |||
| 20 | 0.7874 | |||
| 51/64 | 0.7969 | |||
| 20.5 | 0.8071 | |||
| 13/16 | 0.8125 | |||
| 21 | 0.8268 | |||
| 53/64 | 0.8281 | |||
| 27/32 | 0.8438 | |||
| 21.5 | 0.8465 | |||
| 55/64 | 0.8594 | |||
| 22 | 0.8661 | |||
| 7/8 | 0.8750 | |||
| 22.5 | 0.8858 | |||
| 57/64 | 0.8906 | |||
| 23 | 0.9055 | |||
| 29/32 | 0.9062 | |||
| 59/64 | 0.9219 | |||
| 23.5 | 0.9252 | |||
| 15/16 | 0.9375 | |||
| 24 | 0.9449 | |||
| 61/64 | 0.9531 | |||
| 24.5 | 0.9646 | |||
| 31/32 | 0.9688 | |||
| 25 | 0.9843 | |||
| 63/64 | 0.9844 | |||
| 1 | 1.0000 |