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Drill Sizes

Type Size Inches Millimeters
Millimeter 00.10 0.003937 00.100000
Millimeter 00.15 0.005905 00.150000
Millimeter 00.20 0.007874 00.200000
Millimeter 00.25 0.009842 00.250000
Millimeter 00.30 0.011811 00.300000
Number 80 0.013000 00.330200
Number 79.5 0.013500 00.342900
Millimeter 00.35 0.013779 00.350000
Number 79 0.014000 00.355600
Number 78.5 0.014500 00.368300
Number 78 0.015000 00.381000
Inch 01/64 0.015625 00.396875
Millimeter 00.40 0.015748 00.400000
Number 77 0.016000 00.406400
Millimeter 00.45 0.017716 00.450000
Number 76 0.018000 00.457200
Millimeter 00.50 0.019685 00.500000
Number 75 0.020000 00.508000
Number 74.5 0.021000 00.533400
Millimeter 00.55 0.021653 00.550000
Number 74 0.022000 00.558800
Number 73.5 0.022500 00.571500
Number 73 0.023000 00.584200
Millimeter 00.60 0.023622 00.600000
Number 72 0.024000 00.609600
Number 71.5 0.025000 00.635000
Millimeter 00.65 0.025590 00.650000
Number 71 0.026000 00.660400
Number 70 0.027000 00.685800
Millimeter 00.70 0.027559 00.700000
Number 69.5 0.028000 00.711200
Number 69 0.029000 00.736600
Number 68.5 0.029250 00.742950
Millimeter 00.75 0.029527 00.750000
Number 68 0.030000 00.762000
Number 67 0.031000 00.787400
Inch 01/32 0.031250 00.793750
Millimeter 00.80 0.031496 00.800000
Number 66 0.032000 00.812800
Number 65 0.033000 00.838200
Millimeter 00.85 0.033464 00.850000
Number 64 0.035000 00.889000
Millimeter 00.90 0.035433 00.900000
Number 63 0.036000 00.914400
Number 62 0.037000 00.939800
Millimeter 00.95 0.037401 00.950000
Number 61 0.038000 00.965200
Number 60.5 0.039000 00.990600
Millimeter 01.00 0.039370 01.000000
Number 60 0.040000 01.016000
Number 59 0.041000 01.041400
Millimeter 01.05 0.041338 01.050000
Number 58 0.042000 01.066800
Number 57 0.043000 01.092200
Millimeter 01.10 0.043307 01.100000
Millimeter 01.15 0.045275 01.150000
Number 56 0.046500 01.181100
Inch 03/64 0.046875 01.190625
Millimeter 01.20 0.047244 01.200000
Millimeter 01.25 0.049212 01.250000
Millimeter 01.30 0.051181 01.300000
Number 55 0.052000 01.320000
Millimeter 01.35 0.053149 01.350000
Number 54 0.055000 01.397000
Millimeter 01.40 0.055118 01.400000
Millimeter 01.45 0.057086 01.450000
Millimeter 01.50 0.059055 01.500000
Number 53 0.059500 01.511300
Millimeter 01.55 0.061023 01.550000
Inch 01/16 0.062500 01.587500
Millimeter 01.60 0.062992 01.600000
Number 52 0.063500 01.612900
Millimeter 01.65 0.064960 01.650000
Millimeter 01.70 0.066929 01.700000
Number 51 0.067000 01.701800
Millimeter 01.75 0.068897 01.750000
Number 50 0.070000 01.778000
Millimeter 01.80 0.070866 01.800000
Millimeter 01.85 0.072834 01.850000
Number 49 0.073000 01.854200
Millimeter 01.90 0.074803 01.900000
Number 48 0.076000 01.930400
Millimeter 01.95 0.076771 01.950000
Inch 05/64 0.078125 01.984375
Number 47 0.078500 01.993900
Millimeter 02.00 0.078740 02.000000
Millimeter 02.05 0.080708 02.050000
Number 46 0.081000 02.057400
Number 45 0.082000 02.082800
Millimeter 02.10 0.082677 02.100000
Millimeter 02.15 0.084645 02.150000
Number 44 0.086000 02.184400
Millimeter 02.20 0.086614 02.200000
Millimeter 02.25 0.088582 02.250000
Number 43 0.089000 02.260600
Millimeter 02.30 0.090551 02.300000
Millimeter 02.35 0.092519 02.350000
Number 42 0.093500 02.374900
Inch 03/32 0.093750 02.381250
Millimeter 02.40 0.094488 02.400000
Number 41 0.096000 02.438400
Millimeter 02.45 0.096456 02.450000
Number 40 0.098000 02.489200
Millimeter 02.50 0.098425 02.500000
Number 39 0.099500 02.527300
Number 38 0.101500 02.578100
Millimeter 02.60 0.102362 02.600000
Number 37 0.104000 02.578100
Millimeter 02.70 0.106299 02.700000
Number 36 0.106500 02.705100
Millimeter 02.75 0.108267 02.750000
Inch 07/64 0.109375 02.778125
Number 35 0.110000 02.794000
Millimeter 02.80 0.110236 02.800000
Number 34 0.111000 02.819400
Number 33 0.113000 02.870200
Millimeter 02.90 0.114173 02.900000
Number 32 0.116000 02.946400
Millimeter 03.00 0.118110 03.000000
Number 31 0.120000 03.048000
Millimeter 03.10 0.122047 03.100000
Inch 01/08 0.125000 03.175000
Millimeter 03.20 0.125984 03.200000
Millimeter 03.25 0.127952 03.250000
Number 30 0.128500 03.263900
Millimeter 03.30 0.129921 03.300000
Millimeter 03.40 0.133858 03.400000
Number 29 0.136000 03.454400
Millimeter 03.50 0.137795 03.500000
Number 28 0.140500 03.568700
Inch 09/64 0.140625 03.571875
Millimeter 03.60 0.141732 03.600000
Number 27 0.144000 03.657600
Millimeter 03.70 0.145669 03.700000
Number 26 0.147000 03.733800
Millimeter 03.75 0.147637 03.750000
Number 25 0.149500 03.797300
Millimeter 03.80 0.149606 03.800000
Number 24 0.152000 03.860800
Millimeter 03.90 0.153543 03.900000
Number 23 0.154000 03.911600
Inch 05/32 0.156250 03.968750
Number 22 0.157000 03.987800
Millimeter 04.00 0.157480 04.000000
Number 21 0.159000 04.038600
Number 20 0.161000 04.089400
Millimeter 04.10 0.161417 04.100000
Millimeter 04.20 0.165354 04.200000
Number 19 0.166000 04.216400
Millimeter 04.25 0.167322 04.250000
Millimeter 04.30 0.169291 04.300000
Number 18 0.169500 04.305300
Inch 11/64 0.171875 04.365625
Number 17 0.173000 04.394200
Millimeter 04.40 0.173228 04.400000
Number 16 0.177000 04.495800
Millimeter 04.50 0.177165 04.500000
Number 15 0.180000 04.572000
Millimeter 04.60 0.181102 04.600000
Number 14 0.182000 04.622800
Number 13 0.185000 04.699000
Millimeter 04.70 0.185039 04.700000
Millimeter 04.75 0.187007 04.750000
Inch 03/16 0.187500 04.762500
Millimeter 04.80 0.188976 04.800000
Number 12 0.189000 04.800600
Number 11 0.191000 04.851400
Millimeter 04.90 0.192913 04.900000
Number 10 0.193500 04.914900
Number 09 0.196000 04.978400
Millimeter 05.00 0.196850 05.000000
Number 08 0.199000 05.054600
Millimeter 05.10 0.200787 05.100000
Number 07 0.201000 05.105400
Inch 13/64 0.203125 05.159375
Number 06 0.204000 05.181600
Millimeter 05.20 0.204724 05.200000
Number 05 0.205500 05.219700
Millimeter 05.25 0.206692 05.250000
Millimeter 05.30 0.208661 05.300000
Number 04 0.209000 05.308600
Millimeter 05.40 0.212598 05.400000
Number 03 0.213000 05.410200
Millimeter 05.50 0.216535 05.500000
Inch 07/32 0.218750 05.556250
Millimeter 05.60 0.220472 05.600000
Number 02 0.221000 05.613400
Millimeter 05.70 0.224409 05.700000
Millimeter 05.75 0.226377 05.750000
Number 01 0.228000 05.791200
Millimeter 05.80 0.228346 05.800000
Millimeter 05.90 0.232283 05.900000
Letter A 0.234000 05.943600
Inch 15/64 0.234375 05.953125
Millimeter 06.00 0.236220 06.000000
Letter B 0.238000 06.045200
Millimeter 06.10 0.240157 06.100000
Letter C 0.242000 06.146800
Millimeter 06.20 0.244094 06.200000
Letter D 0.246000 06.248400
Millimeter 06.25 0.246062 06.250000
Millimeter 06.30 0.248031 06.300000
Inch 01/04 0.250000 06.350000
Letter E 0.250000 06.350000
Millimeter 06.40 0.251968 06.400000
Millimeter 06.50 0.255905 06.500000
Letter F 0.257000 06.527800
Millimeter 06.60 0.259842 06.600000
Letter G 0.261000 06.629400
Millimeter 06.70 0.263779 06.700000
Inch 17/64 0.265625 06.746875
Millimeter 06.75 0.265747 06.750000
Letter H 0.266000 06.756400
Millimeter 06.80 0.267716 06.800000
Millimeter 06.90 0.271653 06.900000
Letter I 0.272000 06.908800
Millimeter 07.00 0.275590 07.000000
Letter J 0.277000 07.035800
Millimeter 07.10 0.279527 07.100000
Letter K 0.281000 07.137400
Inch 09/32 0.281250 07.143750
Millimeter 07.20 0.283464 07.200000
Millimeter 07.25 0.285432 07.250000
Millimeter 07.30 0.287401 07.300000
Letter L 0.290000 07.366000
Millimeter 07.40 0.291338 07.400000
Letter M 0.295000 07.493000
Millimeter 07.50 0.295275 07.500000
Inch 19/64 0.296875 07.540625
Millimeter 07.60 0.299212 07.600000
Letter N 0.302000 07.670800
Millimeter 07.70 0.303149 07.700000
Millimeter 07.75 0.305117 07.750000
Millimeter 07.80 0.307086 07.800000
Millimeter 07.90 0.311023 07.900000
Inch 05/16 0.312500 07.937500
Millimeter 08.00 0.314960 08.000000
Letter O 0.316000 08.026400
Millimeter 08.10 0.318897 08.100000
Millimeter 08.20 0.322834 08.200000
Letter P 0.323000 08.204200
Millimeter 08.25 0.324802 08.250000
Millimeter 08.30 0.326771 08.300000
Inch 21/64 0.328125 08.334375
Millimeter 08.40 0.330708 08.400000
Letter Q 0.332000 08.432800
Millimeter 08.50 0.334645 08.500000
Millimeter 08.60 0.338582 08.600000
Letter R 0.339000 08.610600
Millimeter 08.70 0.342519 08.700000
Inch 11/32 0.343750 08.731250
Millimeter 08.75 0.344487 08.750000
Millimeter 08.80 0.346456 08.800000
Letter S 0.348000 08.839200
Millimeter 08.90 0.350393 08.900000
Millimeter 09.00 0.354330 09.000000
Letter T 0.358000 09.093200
Millimeter 09.10 0.358267 09.100000
Inch 23/64 0.359375 09.128125
Millimeter 09.20 0.362204 09.200000
Millimeter 09.25 0.364172 09.250000
Millimeter 09.30 0.366141 09.300000
Letter U 0.368000 09.347200
Millimeter 09.40 0.370078 09.400000
Millimeter 09.50 0.374015 09.500000
Inch 03/08 0.375000 09.525000
Letter V 0.377000 09.575800
Millimeter 09.60 0.377952 09.600000
Millimeter 09.70 0.381889 09.700000
Millimeter 09.75 0.383857 09.750000
Millimeter 09.80 0.385826 09.800000
Letter W 0.386000 09.804400
Millimeter 09.90 0.389763 09.900000
Inch 25/64 0.390625 09.921875
Millimeter 10.00 0.393700 10.000000
Letter X 0.397000 10.083800
Letter Y 0.404000 10.261600
Inch 13/32 0.406250 10.318750
Letter Z 0.413000 10.490200
Millimeter 10.50 0.413385 10.500000
Inch 27/64 0.421875 10.715625
Millimeter 11.00 0.433070 11.000000
Inch 07/16 0.437500 11.112500
Millimeter 11.50 0.452755 11.500000
Inch 29/64 0.453125 11.509375
Inch 15/32 0.468750 11.906250
Millimeter 12.00 0.472440 12.000000
Inch 31/64 0.484375 12.303125
Millimeter 12.50 0.492125 12.500000
Inch 01/02 0.500000 12.700000
Millimeter 13.00 0.511810 13.000000
Inch 33/64 0.515625 13.096875
Inch 17/32 0.531250 13.493750
Millimeter 13.50 0.531495 13.500000
Inch 35/64 0.546875 13.890625
Millimeter 14.00 0.551180 14.000000
Inch 09/16 0.562500 14.287500
Millimeter 14.50 0.570865 14.500000
Inch 37/64 0.578125 14.684375
Millimeter 15.00 0.590550 15.000000
Inch 19/32 0.593750 15.081250
Inch 39/64 0.609375 15.478125
Millimeter 15.50 0.610235 15.500000
Inch 05/08 0.625000 15.875000
Millimeter 16.00 0.629920 16.000000
Inch 41/64 0.640625 16.271875
Millimeter 16.50 0.649605 16.500000
Inch 21/32 0.656250 16.668750
Millimeter 17.00 0.669290 17.000000
Inch 43/64 0.671875 17.065625
Inch 11/16 0.687500 17.462500
Millimeter 17.50 0.688975 17.500000
Inch 45/64 0.703125 17.859375
Millimeter 18.00 0.708660 18.000000
Inch 23/32 0.718750 18.256250
Millimeter 18.50 0.728345 18.500000
Inch 47/64 0.734375 18.653125
Millimeter 19.00 0.748030 19.000000
Inch 03/04 0.750000 19.050000
Inch 49/64 0.765625 19.446875
Millimeter 19.50 0.767715 19.500000
Inch 25/32 0.781250 19.843750
Millimeter 20.00 0.787400 20.000000
Inch 51/64 0.796875 20.240625
Millimeter 20.50 0.807085 20.500000
Inch 13/16 0.812500 20.637500
Millimeter 21.00 0.826770 21.000000
Inch 53/64 0.828125 21.034375
Inch 27/64 0.843750 21.431250
Millimeter 21.50 0.846455 21.500000
Inch 55/64 0.859375 21.828125
Millimeter 22.00 0.866140 22.000000
Inch 07/08 0.875000 22.225000
Millimeter 22.50 0.885825 22.500000
Inch 57/64 0.890625 22.621875
Millimeter 23.00 0.905510 23.000000
Inch 29/32 0.906250 23.018750
Inch 59/64 0.921875 23.415625
Millimeter 23.50 0.925195 23.500000
Inch 15/16 0.937500 23.812500
Millimeter 24.00 0.944880 24.000000
Inch 61/64 0.953125 24.209375
Millimeter 24.50 0.964565 24.500000
Inch 31/32 0.968750 24.606250
Millimeter 25.00 0.984250 25.000000
Inch 63/64 0.984375 25.003125
Inch 01/01 1.000000 25.400000