{"id":14624,"date":"2025-04-01T14:08:46","date_gmt":"2025-04-01T19:08:46","guid":{"rendered":"https:\/\/blog.misumiusa.com\/?page_id=14624"},"modified":"2025-04-01T14:37:30","modified_gmt":"2025-04-01T19:37:30","slug":"drill-bit-size-chart","status":"publish","type":"page","link":"https:\/\/blog.misumiusa.com\/drill-bit-size-chart\/","title":{"rendered":"Drill Bit Size Chart"},"content":{"rendered":"\n<p>This drill bit size chart includes three main categorization systems:<\/p>\n\n\n\n<ol type=\"1\"><li><a href=\"#fractional-sizes\">Fractional Sizes<\/a> &#8211; The standard imperial measurements (1\/64&#8243;, 1\/32&#8243;, etc.) with their decimal inch and metric (mm) equivalents.<\/li><li><a href=\"#letter-sizes\">Letter Sizes<\/a> &#8211; These range from A to Z, with corresponding decimal inch and metric conversions.<\/li><li><a href=\"#number-sizes\">Number Sizes<\/a> &#8211; These range from #1 (largest) to #80 (smallest), commonly used for precision work.<\/li><li><a href=\"#metric-sizes\">Metric Sizes<\/a> &#8211; The most common metric drill bit sizes with their decimal inch equivalents.<\/li><\/ol>\n\n\n\n<h2 id=\"fractional-sizes\"><strong>Fractional Sizes (Standard)<\/strong><\/h2>\n\n\n\n<table class=\"wp-table\">\n  <thead>\n    <tr>\n      <th>Fraction (inches)<\/th>\n      <th>Decimal (inches)<\/th>\n      <th>Metric (mm)<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>1\/64<\/td>\n      <td>0.0156<\/td>\n      <td>0.397<\/td>\n    <\/tr>\n    <tr>\n      <td>1\/32<\/td>\n      <td>0.0313<\/td>\n      <td>0.794<\/td>\n    <\/tr>\n    <tr>\n      <td>3\/64<\/td>\n      <td>0.0469<\/td>\n      <td>1.191<\/td>\n    <\/tr>\n    <tr>\n      <td>1\/16<\/td>\n      <td>0.0625<\/td>\n      <td>1.588<\/td>\n    <\/tr>\n    <tr>\n      <td>5\/64<\/td>\n      <td>0.0781<\/td>\n      <td>1.984<\/td>\n    <\/tr>\n    <tr>\n      <td>3\/32<\/td>\n      <td>0.0938<\/td>\n      <td>2.381<\/td>\n    <\/tr>\n    <tr>\n      <td>7\/64<\/td>\n      <td>0.1094<\/td>\n      <td>2.778<\/td>\n    <\/tr>\n    <tr>\n      <td>1\/8<\/td>\n      <td>0.1250<\/td>\n      <td>3.175<\/td>\n    <\/tr>\n    <tr>\n      <td>9\/64<\/td>\n      <td>0.1406<\/td>\n      <td>3.572<\/td>\n    <\/tr>\n    <tr>\n      <td>5\/32<\/td>\n      <td>0.1563<\/td>\n      <td>3.969<\/td>\n    <\/tr>\n    <tr>\n      <td>11\/64<\/td>\n      <td>0.1719<\/td>\n      <td>4.366<\/td>\n    <\/tr>\n    <tr>\n      <td>3\/16<\/td>\n      <td>0.1875<\/td>\n      <td>4.763<\/td>\n    <\/tr>\n    <tr>\n      <td>13\/64<\/td>\n      <td>0.2031<\/td>\n      <td>5.159<\/td>\n    <\/tr>\n    <tr>\n      <td>7\/32<\/td>\n      <td>0.2188<\/td>\n      <td>5.556<\/td>\n    <\/tr>\n    <tr>\n      <td>15\/64<\/td>\n      <td>0.2344<\/td>\n      <td>5.953<\/td>\n    <\/tr>\n    <tr>\n      <td>1\/4<\/td>\n      <td>0.2500<\/td>\n      <td>6.350<\/td>\n    <\/tr>\n    <tr>\n      <td>17\/64<\/td>\n      <td>0.2656<\/td>\n      <td>6.747<\/td>\n    <\/tr>\n    <tr>\n      <td>9\/32<\/td>\n      <td>0.2813<\/td>\n      <td>7.144<\/td>\n    <\/tr>\n    <tr>\n      <td>19\/64<\/td>\n      <td>0.2969<\/td>\n      <td>7.541<\/td>\n    <\/tr>\n    <tr>\n      <td>5\/16<\/td>\n      <td>0.3125<\/td>\n      <td>7.938<\/td>\n    <\/tr>\n    <tr>\n      <td>21\/64<\/td>\n      <td>0.3281<\/td>\n      <td>8.334<\/td>\n    <\/tr>\n    <tr>\n      <td>11\/32<\/td>\n      <td>0.3438<\/td>\n      <td>8.731<\/td>\n    <\/tr>\n    <tr>\n      <td>23\/64<\/td>\n      <td>0.3594<\/td>\n      <td>9.128<\/td>\n    <\/tr>\n    <tr>\n      <td>3\/8<\/td>\n      <td>0.3750<\/td>\n      <td>9.525<\/td>\n    <\/tr>\n    <tr>\n      <td>25\/64<\/td>\n      <td>0.3906<\/td>\n      <td>9.922<\/td>\n    <\/tr>\n    <tr>\n      <td>13\/32<\/td>\n      <td>0.4063<\/td>\n      <td>10.319<\/td>\n    <\/tr>\n    <tr>\n      <td>27\/64<\/td>\n      <td>0.4219<\/td>\n      <td>10.716<\/td>\n    <\/tr>\n    <tr>\n      <td>7\/16<\/td>\n      <td>0.4375<\/td>\n      <td>11.113<\/td>\n    <\/tr>\n    <tr>\n      <td>29\/64<\/td>\n      <td>0.4531<\/td>\n      <td>11.509<\/td>\n    <\/tr>\n    <tr>\n      <td>15\/32<\/td>\n      <td>0.4688<\/td>\n      <td>11.906<\/td>\n    <\/tr>\n    <tr>\n      <td>31\/64<\/td>\n      <td>0.4844<\/td>\n      <td>12.303<\/td>\n    <\/tr>\n    <tr>\n      <td>1\/2<\/td>\n      <td>0.5000<\/td>\n      <td>12.700<\/td>\n    <\/tr>\n    <tr>\n      <td>33\/64<\/td>\n      <td>0.5156<\/td>\n      <td>13.097<\/td>\n    <\/tr>\n    <tr>\n      <td>17\/32<\/td>\n      <td>0.5313<\/td>\n      <td>13.494<\/td>\n    <\/tr>\n    <tr>\n      <td>35\/64<\/td>\n      <td>0.5469<\/td>\n      <td>13.891<\/td>\n    <\/tr>\n    <tr>\n      <td>9\/16<\/td>\n      <td>0.5625<\/td>\n      <td>14.288<\/td>\n    <\/tr>\n    <tr>\n      <td>37\/64<\/td>\n      <td>0.5781<\/td>\n      <td>14.684<\/td>\n    <\/tr>\n    <tr>\n      <td>19\/32<\/td>\n      <td>0.5938<\/td>\n      <td>15.081<\/td>\n    <\/tr>\n    <tr>\n      <td>39\/64<\/td>\n      <td>0.6094<\/td>\n      <td>15.478<\/td>\n    <\/tr>\n    <tr>\n      <td>5\/8<\/td>\n      <td>0.6250<\/td>\n      <td>15.875<\/td>\n    <\/tr>\n    <tr>\n      <td>41\/64<\/td>\n      <td>0.6406<\/td>\n      <td>16.272<\/td>\n    <\/tr>\n    <tr>\n      <td>21\/32<\/td>\n      <td>0.6563<\/td>\n      <td>16.669<\/td>\n    <\/tr>\n    <tr>\n      <td>43\/64<\/td>\n      <td>0.6719<\/td>\n      <td>17.066<\/td>\n    <\/tr>\n    <tr>\n      <td>11\/16<\/td>\n      <td>0.6875<\/td>\n      <td>17.463<\/td>\n    <\/tr>\n    <tr>\n      <td>45\/64<\/td>\n      <td>0.7031<\/td>\n      <td>17.859<\/td>\n    <\/tr>\n    <tr>\n      <td>23\/32<\/td>\n      <td>0.7188<\/td>\n      <td>18.256<\/td>\n    <\/tr>\n    <tr>\n      <td>47\/64<\/td>\n      <td>0.7344<\/td>\n      <td>18.653<\/td>\n    <\/tr>\n    <tr>\n      <td>3\/4<\/td>\n      <td>0.7500<\/td>\n      <td>19.050<\/td>\n    <\/tr>\n    <tr>\n      <td>49\/64<\/td>\n      <td>0.7656<\/td>\n      <td>19.447<\/td>\n    <\/tr>\n    <tr>\n      <td>25\/32<\/td>\n      <td>0.7813<\/td>\n      <td>19.844<\/td>\n    <\/tr>\n    <tr>\n      <td>51\/64<\/td>\n      <td>0.7969<\/td>\n      <td>20.241<\/td>\n    <\/tr>\n    <tr>\n      <td>13\/16<\/td>\n      <td>0.8125<\/td>\n      <td>20.638<\/td>\n    <\/tr>\n    <tr>\n      <td>53\/64<\/td>\n      <td>0.8281<\/td>\n      <td>21.034<\/td>\n    <\/tr>\n    <tr>\n      <td>27\/32<\/td>\n      <td>0.8438<\/td>\n      <td>21.431<\/td>\n    <\/tr>\n    <tr>\n      <td>55\/64<\/td>\n      <td>0.8594<\/td>\n      <td>21.828<\/td>\n    <\/tr>\n    <tr>\n      <td>7\/8<\/td>\n      <td>0.8750<\/td>\n      <td>22.225<\/td>\n    <\/tr>\n    <tr>\n      <td>57\/64<\/td>\n      <td>0.8906<\/td>\n      <td>22.622<\/td>\n    <\/tr>\n    <tr>\n      <td>29\/32<\/td>\n      <td>0.9063<\/td>\n      <td>23.019<\/td>\n    <\/tr>\n    <tr>\n      <td>59\/64<\/td>\n      <td>0.9219<\/td>\n      <td>23.416<\/td>\n    <\/tr>\n    <tr>\n      <td>15\/16<\/td>\n      <td>0.9375<\/td>\n      <td>23.813<\/td>\n    <\/tr>\n    <tr>\n      <td>61\/64<\/td>\n      <td>0.9531<\/td>\n      <td>24.209<\/td>\n    <\/tr>\n    <tr>\n      <td>31\/32<\/td>\n      <td>0.9688<\/td>\n      <td>24.606<\/td>\n    <\/tr>\n    <tr>\n      <td>63\/64<\/td>\n      <td>0.9844<\/td>\n      <td>25.003<\/td>\n    <\/tr>\n    <tr>\n      <td>1<\/td>\n      <td>1.0000<\/td>\n      <td>25.400<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n\n<p><\/p>\n\n\n\n<h2 id=\"letter-sizes\"><strong>Letter Sizes<\/strong><\/h2>\n\n\n\n<table class=\"wp-table\">\n  <thead>\n    <tr>\n      <th>Letter<\/th>\n      <th>Decimal (inches)<\/th>\n      <th>Metric (mm)<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>A<\/td>\n      <td>0.234<\/td>\n      <td>5.944<\/td>\n    <\/tr>\n    <tr>\n      <td>B<\/td>\n      <td>0.238<\/td>\n      <td>6.045<\/td>\n    <\/tr>\n    <tr>\n      <td>C<\/td>\n      <td>0.242<\/td>\n      <td>6.147<\/td>\n    <\/tr>\n    <tr>\n      <td>D<\/td>\n      <td>0.246<\/td>\n      <td>6.248<\/td>\n    <\/tr>\n    <tr>\n      <td>E<\/td>\n      <td>0.250<\/td>\n      <td>6.350<\/td>\n    <\/tr>\n    <tr>\n      <td>F<\/td>\n      <td>0.257<\/td>\n      <td>6.528<\/td>\n    <\/tr>\n    <tr>\n      <td>G<\/td>\n      <td>0.261<\/td>\n      <td>6.629<\/td>\n    <\/tr>\n    <tr>\n      <td>H<\/td>\n      <td>0.266<\/td>\n      <td>6.756<\/td>\n    <\/tr>\n    <tr>\n      <td>I<\/td>\n      <td>0.272<\/td>\n      <td>6.909<\/td>\n    <\/tr>\n    <tr>\n      <td>J<\/td>\n      <td>0.277<\/td>\n      <td>7.036<\/td>\n    <\/tr>\n    <tr>\n      <td>K<\/td>\n      <td>0.281<\/td>\n      <td>7.137<\/td>\n    <\/tr>\n    <tr>\n      <td>L<\/td>\n      <td>0.290<\/td>\n      <td>7.366<\/td>\n    <\/tr>\n    <tr>\n      <td>M<\/td>\n      <td>0.295<\/td>\n      <td>7.493<\/td>\n    <\/tr>\n    <tr>\n      <td>N<\/td>\n      <td>0.302<\/td>\n      <td>7.671<\/td>\n    <\/tr>\n    <tr>\n      <td>O<\/td>\n      <td>0.316<\/td>\n      <td>8.026<\/td>\n    <\/tr>\n    <tr>\n      <td>P<\/td>\n      <td>0.323<\/td>\n      <td>8.204<\/td>\n    <\/tr>\n    <tr>\n      <td>Q<\/td>\n      <td>0.332<\/td>\n      <td>8.433<\/td>\n    <\/tr>\n    <tr>\n      <td>R<\/td>\n      <td>0.339<\/td>\n      <td>8.611<\/td>\n    <\/tr>\n    <tr>\n      <td>S<\/td>\n      <td>0.348<\/td>\n      <td>8.839<\/td>\n    <\/tr>\n    <tr>\n      <td>T<\/td>\n      <td>0.358<\/td>\n      <td>9.093<\/td>\n    <\/tr>\n    <tr>\n      <td>U<\/td>\n      <td>0.368<\/td>\n      <td>9.347<\/td>\n    <\/tr>\n    <tr>\n      <td>V<\/td>\n      <td>0.377<\/td>\n      <td>9.576<\/td>\n    <\/tr>\n    <tr>\n      <td>W<\/td>\n      <td>0.386<\/td>\n      <td>9.804<\/td>\n    <\/tr>\n    <tr>\n      <td>X<\/td>\n      <td>0.397<\/td>\n      <td>10.084<\/td>\n    <\/tr>\n    <tr>\n      <td>Y<\/td>\n      <td>0.404<\/td>\n      <td>10.262<\/td>\n    <\/tr>\n    <tr>\n      <td>Z<\/td>\n      <td>0.413<\/td>\n      <td>10.490<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n\n<h2 id=\"number-sizes\"><strong>Number Sizes<\/strong><\/h2>\n\n\n\n<table class=\"wp-table\">\n  <thead>\n    <tr>\n      <th>Number<\/th>\n      <th>Decimal (inches)<\/th>\n      <th>Metric (mm)<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>1<\/td>\n      <td>0.228<\/td>\n      <td>5.791<\/td>\n    <\/tr>\n    <tr>\n      <td>2<\/td>\n      <td>0.221<\/td>\n      <td>5.613<\/td>\n    <\/tr>\n    <tr>\n      <td>3<\/td>\n      <td>0.213<\/td>\n      <td>5.410<\/td>\n    <\/tr>\n    <tr>\n      <td>4<\/td>\n      <td>0.209<\/td>\n      <td>5.309<\/td>\n    <\/tr>\n    <tr>\n      <td>5<\/td>\n      <td>0.205<\/td>\n      <td>5.207<\/td>\n    <\/tr>\n    <tr>\n      <td>6<\/td>\n      <td>0.204<\/td>\n      <td>5.182<\/td>\n    <\/tr>\n    <tr>\n      <td>7<\/td>\n      <td>0.201<\/td>\n      <td>5.105<\/td>\n    <\/tr>\n    <tr>\n      <td>8<\/td>\n      <td>0.199<\/td>\n      <td>5.055<\/td>\n    <\/tr>\n    <tr>\n      <td>9<\/td>\n      <td>0.196<\/td>\n      <td>4.978<\/td>\n    <\/tr>\n    <tr>\n      <td>10<\/td>\n      <td>0.1935<\/td>\n      <td>4.915<\/td>\n    <\/tr>\n    <tr>\n      <td>11<\/td>\n      <td>0.191<\/td>\n      <td>4.851<\/td>\n    <\/tr>\n    <tr>\n      <td>12<\/td>\n      <td>0.189<\/td>\n      <td>4.801<\/td>\n    <\/tr>\n    <tr>\n      <td>13<\/td>\n      <td>0.185<\/td>\n      <td>4.699<\/td>\n    <\/tr>\n    <tr>\n      <td>14<\/td>\n      <td>0.182<\/td>\n      <td>4.623<\/td>\n    <\/tr>\n    <tr>\n      <td>15<\/td>\n      <td>0.180<\/td>\n      <td>4.572<\/td>\n    <\/tr>\n    <tr>\n      <td>16<\/td>\n      <td>0.177<\/td>\n      <td>4.496<\/td>\n    <\/tr>\n    <tr>\n      <td>17<\/td>\n      <td>0.173<\/td>\n      <td>4.394<\/td>\n    <\/tr>\n    <tr>\n      <td>18<\/td>\n      <td>0.1695<\/td>\n      <td>4.305<\/td>\n    <\/tr>\n    <tr>\n      <td>19<\/td>\n      <td>0.166<\/td>\n      <td>4.216<\/td>\n    <\/tr>\n    <tr>\n      <td>20<\/td>\n      <td>0.161<\/td>\n      <td>4.089<\/td>\n    <\/tr>\n    <tr>\n      <td>21<\/td>\n      <td>0.159<\/td>\n      <td>4.039<\/td>\n    <\/tr>\n    <tr>\n      <td>22<\/td>\n      <td>0.157<\/td>\n      <td>3.988<\/td>\n    <\/tr>\n    <tr>\n      <td>23<\/td>\n      <td>0.154<\/td>\n      <td>3.912<\/td>\n    <\/tr>\n    <tr>\n      <td>24<\/td>\n      <td>0.152<\/td>\n      <td>3.861<\/td>\n    <\/tr>\n    <tr>\n      <td>25<\/td>\n      <td>0.1495<\/td>\n      <td>3.797<\/td>\n    <\/tr>\n    <tr>\n      <td>26<\/td>\n      <td>0.147<\/td>\n      <td>3.734<\/td>\n    <\/tr>\n    <tr>\n      <td>27<\/td>\n      <td>0.144<\/td>\n      <td>3.658<\/td>\n    <\/tr>\n    <tr>\n      <td>28<\/td>\n      <td>0.1405<\/td>\n      <td>3.569<\/td>\n    <\/tr>\n    <tr>\n      <td>29<\/td>\n      <td>0.136<\/td>\n      <td>3.454<\/td>\n    <\/tr>\n    <tr>\n      <td>30<\/td>\n      <td>0.1285<\/td>\n      <td>3.264<\/td>\n    <\/tr>\n    <tr>\n      <td>31<\/td>\n      <td>0.120<\/td>\n      <td>3.048<\/td>\n    <\/tr>\n    <tr>\n      <td>32<\/td>\n      <td>0.116<\/td>\n      <td>2.946<\/td>\n    <\/tr>\n    <tr>\n      <td>33<\/td>\n      <td>0.113<\/td>\n      <td>2.870<\/td>\n    <\/tr>\n    <tr>\n      <td>34<\/td>\n      <td>0.111<\/td>\n      <td>2.819<\/td>\n    <\/tr>\n    <tr>\n      <td>35<\/td>\n      <td>0.110<\/td>\n      <td>2.794<\/td>\n    <\/tr>\n    <tr>\n      <td>36<\/td>\n      <td>0.1065<\/td>\n      <td>2.705<\/td>\n    <\/tr>\n    <tr>\n      <td>37<\/td>\n      <td>0.104<\/td>\n      <td>2.642<\/td>\n    <\/tr>\n    <tr>\n      <td>38<\/td>\n      <td>0.1015<\/td>\n      <td>2.578<\/td>\n    <\/tr>\n    <tr>\n      <td>39<\/td>\n      <td>0.0995<\/td>\n      <td>2.527<\/td>\n    <\/tr>\n    <tr>\n      <td>40<\/td>\n      <td>0.098<\/td>\n      <td>2.489<\/td>\n    <\/tr>\n    <tr>\n      <td>41<\/td>\n      <td>0.096<\/td>\n      <td>2.438<\/td>\n    <\/tr>\n    <tr>\n      <td>42<\/td>\n      <td>0.0935<\/td>\n      <td>2.375<\/td>\n    <\/tr>\n    <tr>\n      <td>43<\/td>\n      <td>0.089<\/td>\n      <td>2.261<\/td>\n    <\/tr>\n    <tr>\n      <td>44<\/td>\n      <td>0.086<\/td>\n      <td>2.184<\/td>\n    <\/tr>\n    <tr>\n      <td>45<\/td>\n      <td>0.082<\/td>\n      <td>2.083<\/td>\n    <\/tr>\n    <tr>\n      <td>46<\/td>\n      <td>0.081<\/td>\n      <td>2.057<\/td>\n    <\/tr>\n    <tr>\n      <td>47<\/td>\n      <td>0.0785<\/td>\n      <td>1.994<\/td>\n    <\/tr>\n    <tr>\n      <td>48<\/td>\n      <td>0.076<\/td>\n      <td>1.930<\/td>\n    <\/tr>\n    <tr>\n      <td>49<\/td>\n      <td>0.073<\/td>\n      <td>1.854<\/td>\n    <\/tr>\n    <tr>\n      <td>50<\/td>\n      <td>0.070<\/td>\n      <td>1.778<\/td>\n    <\/tr>\n    <tr>\n      <td>51<\/td>\n      <td>0.067<\/td>\n      <td>1.702<\/td>\n    <\/tr>\n    <tr>\n      <td>52<\/td>\n      <td>0.0635<\/td>\n      <td>1.613<\/td>\n    <\/tr>\n    <tr>\n      <td>53<\/td>\n      <td>0.0595<\/td>\n      <td>1.511<\/td>\n    <\/tr>\n    <tr>\n      <td>54<\/td>\n      <td>0.055<\/td>\n      <td>1.397<\/td>\n    <\/tr>\n    <tr>\n      <td>55<\/td>\n      <td>0.052<\/td>\n      <td>1.321<\/td>\n    <\/tr>\n    <tr>\n      <td>56<\/td>\n      <td>0.0465<\/td>\n      <td>1.181<\/td>\n    <\/tr>\n    <tr>\n      <td>57<\/td>\n      <td>0.043<\/td>\n      <td>1.092<\/td>\n    <\/tr>\n    <tr>\n      <td>58<\/td>\n      <td>0.042<\/td>\n      <td>1.067<\/td>\n    <\/tr>\n    <tr>\n      <td>59<\/td>\n      <td>0.041<\/td>\n      <td>1.041<\/td>\n    <\/tr>\n    <tr>\n      <td>60<\/td>\n      <td>0.040<\/td>\n      <td>1.016<\/td>\n    <\/tr>\n    <tr>\n      <td>61<\/td>\n      <td>0.039<\/td>\n      <td>0.991<\/td>\n    <\/tr>\n    <tr>\n      <td>62<\/td>\n      <td>0.038<\/td>\n      <td>0.965<\/td>\n    <\/tr>\n    <tr>\n      <td>63<\/td>\n      <td>0.037<\/td>\n      <td>0.940<\/td>\n    <\/tr>\n    <tr>\n      <td>64<\/td>\n      <td>0.036<\/td>\n      <td>0.914<\/td>\n    <\/tr>\n    <tr>\n      <td>65<\/td>\n      <td>0.035<\/td>\n      <td>0.889<\/td>\n    <\/tr>\n    <tr>\n      <td>66<\/td>\n      <td>0.033<\/td>\n      <td>0.838<\/td>\n    <\/tr>\n    <tr>\n      <td>67<\/td>\n      <td>0.032<\/td>\n      <td>0.813<\/td>\n    <\/tr>\n    <tr>\n      <td>68<\/td>\n      <td>0.031<\/td>\n      <td>0.787<\/td>\n    <\/tr>\n    <tr>\n      <td>69<\/td>\n      <td>0.0292<\/td>\n      <td>0.742<\/td>\n    <\/tr>\n    <tr>\n      <td>70<\/td>\n      <td>0.028<\/td>\n      <td>0.711<\/td>\n    <\/tr>\n    <tr>\n      <td>71<\/td>\n      <td>0.026<\/td>\n      <td>0.660<\/td>\n    <\/tr>\n    <tr>\n      <td>72<\/td>\n      <td>0.025<\/td>\n      <td>0.635<\/td>\n    <\/tr>\n    <tr>\n      <td>73<\/td>\n      <td>0.024<\/td>\n      <td>0.610<\/td>\n    <\/tr>\n    <tr>\n      <td>74<\/td>\n      <td>0.0225<\/td>\n      <td>0.572<\/td>\n    <\/tr>\n    <tr>\n      <td>75<\/td>\n      <td>0.021<\/td>\n      <td>0.533<\/td>\n    <\/tr>\n    <tr>\n      <td>76<\/td>\n      <td>0.020<\/td>\n      <td>0.508<\/td>\n    <\/tr>\n    <tr>\n      <td>77<\/td>\n      <td>0.018<\/td>\n      <td>0.457<\/td>\n    <\/tr>\n    <tr>\n      <td>78<\/td>\n      <td>0.016<\/td>\n      <td>0.406<\/td>\n    <\/tr>\n    <tr>\n      <td>79<\/td>\n      <td>0.0145<\/td>\n      <td>0.368<\/td>\n    <\/tr>\n    <tr>\n      <td>80<\/td>\n      <td>0.0135<\/td>\n      <td>0.343<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n\n<h2 id=\"metric-sizes\"><strong>Metric Sizes (Common)<\/strong><\/h2>\n\n\n\n<table class=\"wp-table\">\n  <thead>\n    <tr>\n      <th>Metric (mm)<\/th>\n      <th>Decimal (inches)<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>0.5<\/td>\n      <td>0.0197<\/td>\n    <\/tr>\n    <tr>\n      <td>1.0<\/td>\n      <td>0.0394<\/td>\n    <\/tr>\n    <tr>\n      <td>1.5<\/td>\n      <td>0.0591<\/td>\n    <\/tr>\n    <tr>\n      <td>2.0<\/td>\n      <td>0.0787<\/td>\n    <\/tr>\n    <tr>\n      <td>2.5<\/td>\n      <td>0.0984<\/td>\n    <\/tr>\n    <tr>\n      <td>3.0<\/td>\n      <td>0.1181<\/td>\n    <\/tr>\n    <tr>\n      <td>3.5<\/td>\n      <td>0.1378<\/td>\n    <\/tr>\n    <tr>\n      <td>4.0<\/td>\n      <td>0.1575<\/td>\n    <\/tr>\n    <tr>\n      <td>4.5<\/td>\n      <td>0.1772<\/td>\n    <\/tr>\n    <tr>\n      <td>5.0<\/td>\n      <td>0.1969<\/td>\n    <\/tr>\n    <tr>\n      <td>5.5<\/td>\n      <td>0.2165<\/td>\n    <\/tr>\n    <tr>\n      <td>6.0<\/td>\n      <td>0.2362<\/td>\n    <\/tr>\n    <tr>\n      <td>6.5<\/td>\n      <td>0.2559<\/td>\n    <\/tr>\n    <tr>\n      <td>7.0<\/td>\n      <td>0.2756<\/td>\n    <\/tr>\n    <tr>\n      <td>7.5<\/td>\n      <td>0.2953<\/td>\n    <\/tr>\n    <tr>\n      <td>8.0<\/td>\n      <td>0.3150<\/td>\n    <\/tr>\n    <tr>\n      <td>8.5<\/td>\n      <td>0.3346<\/td>\n    <\/tr>\n    <tr>\n      <td>9.0<\/td>\n      <td>0.3543<\/td>\n    <\/tr>\n    <tr>\n      <td>9.5<\/td>\n      <td>0.3740<\/td>\n    <\/tr>\n    <tr>\n      <td>10.0<\/td>\n      <td>0.3937<\/td>\n    <\/tr>\n    <tr>\n      <td>10.5<\/td>\n      <td>0.4134<\/td>\n    <\/tr>\n    <tr>\n      <td>11.0<\/td>\n      <td>0.4331<\/td>\n    <\/tr>\n    <tr>\n      <td>11.5<\/td>\n      <td>0.4528<\/td>\n    <\/tr>\n    <tr>\n      <td>12.0<\/td>\n      <td>0.4724<\/td>\n    <\/tr>\n    <tr>\n      <td>12.5<\/td>\n      <td>0.4921<\/td>\n    <\/tr>\n    <tr>\n      <td>13.0<\/td>\n      <td>0.5118<\/td>\n    <\/tr>\n    <tr>\n      <td>13.5<\/td>\n      <td>0.5315<\/td>\n    <\/tr>\n    <tr>\n      <td>14.0<\/td>\n      <td>0.5512<\/td>\n    <\/tr>\n    <tr>\n      <td>14.5<\/td>\n      <td>0.5709<\/td>\n    <\/tr>\n    <tr>\n      <td>15.0<\/td>\n      <td>0.5906<\/td>\n    <\/tr>\n    <tr>\n      <td>15.5<\/td>\n      <td>0.6102<\/td>\n    <\/tr>\n    <tr>\n      <td>16.0<\/td>\n      <td>0.6299<\/td>\n    <\/tr>\n    <tr>\n      <td>16.5<\/td>\n      <td>0.6496<\/td>\n    <\/tr>\n    <tr>\n      <td>17.0<\/td>\n      <td>0.6693<\/td>\n    <\/tr>\n    <tr>\n      <td>17.5<\/td>\n      <td>0.6890<\/td>\n    <\/tr>\n    <tr>\n      <td>18.0<\/td>\n      <td>0.7087<\/td>\n    <\/tr>\n    <tr>\n      <td>18.5<\/td>\n      <td>0.7283<\/td>\n    <\/tr>\n    <tr>\n      <td>19.0<\/td>\n      <td>0.7480<\/td>\n    <\/tr>\n    <tr>\n      <td>19.5<\/td>\n      <td>0.7677<\/td>\n    <\/tr>\n    <tr>\n      <td>20.0<\/td>\n      <td>0.7874<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n\n<p>Find a large array of <a href=\"https:\/\/us.misumi-ec.com\/vona2\/fs_machining\/T0107000000\/\" title=\"\">Drill Bits<\/a> at MISUMI USA, and find more charts and articles at MISUMI&#8217;s Mech Lab Blog including a <a href=\"https:\/\/us.misumi-ec.com\/blog\/ screw-threads-size-chart\/\" title=\"\">screw threads size chart<\/a>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Author: <a href=\"https:\/\/us.misumi-ec.com\/blog\/author\/sbredemann\/\" title=\"\">Scott Bredemann<\/a> | Updated: 03\/31\/2025<\/p>\n\n\n\n<p class=\"has-small-font-size\">Disclaimer<br>The content on this webpage is for informational purposes only. MISUMI makes no guarantees, expressed or implied, regarding the accuracy, completeness, or validity of the information. Performance parameters, tolerances, designs, materials, or processes should not be assumed to reflect third-party suppliers\u2019 or manufacturers\u2019 deliverables within MISUMI\u2019s network. Buyers are responsible for specifying their part requirements<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This drill bit size chart includes three main categorization systems: Fractional Sizes &#8211; The standard imperial measurements (1\/64&#8243;, 1\/32&#8243;, etc.) with their decimal inch and metric (mm) equivalents. Letter Sizes &#8211; These range from A to Z, with corresponding decimal inch and metric conversions. Number Sizes &#8211; These range from #1 (largest) to #80 (smallest), commonly used for precision work. [&hellip;]<\/p>\n","protected":false},"author":70,"featured_media":14655,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/pages\/14624"}],"collection":[{"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/comments?post=14624"}],"version-history":[{"count":4,"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/pages\/14624\/revisions"}],"predecessor-version":[{"id":14662,"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/pages\/14624\/revisions\/14662"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/media\/14655"}],"wp:attachment":[{"href":"https:\/\/blog.misumiusa.com\/wp-json\/wp\/v2\/media?parent=14624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}