制定了有助于确定公共电阻和电容值的标准。使用一些数学魔术来计算值（请参阅：Renard系列 99＆E首选号码系列 193）。此过程有助于简化库存和采购需求。
这解释了为什么您会在一个通用值（例如4.99k ohms）而不是诸如5k ohms的电阻值中找到更多的电阻器选项。因此，与非常见值相比，常见值通常更便宜且更容易获得（又称为“库存”）。
还要记住，公差是共同价值观中的一部分。在上面给出的4.99k欧姆的示例中，让我们看一下1％的容差。这意味着实际电阻值可以低至4940欧姆或高至5039.9欧姆，仍然被认为是可以接受的。提供5k电阻器对于产品而言将是多余的。
我在电阻器上看到的最严格的公差是0.001％，因此可以肯定地说，您将永远不会遇到没有公差的完美电阻器。而且，由于我们在本文中讨论的是常见情况，因此可能需要注意的是，大多数商业容差在1％至10％范围内。
这是电阻套件＃541-1420-ND的示例 121 基于E96值：
通用电阻值
基于E24（5％公差）
| 10 | 100 | 1.0千 | 10K | 100K | 100万 |
| 11 | 110 | 1.1千 | 11K | 110K | 110万 |
| 12 | 120 | 1.2千 | 12K | 120K | 1.2m |
| 13 | 130 | 1.3千 | 13K | 130K | 130万 |
| 15 | 150 | 1.5千 | 15K | 150K | 150万 |
| 16 | 160 | 1.6千 | 16K | 16万 | 160万 |
| 18 | 180 | 1.8千 | 18K | 18万 | 180万 |
| 20 | 200 | 2.0K | 20K | 20万 | 200万 |
| 22 | 220 | 2.2千 | 22K | 220K | 220万 |
| 24 | 240 | 2.4K | 24K | 24万 | 240万 |
| 27 | 270 | 2.7千 | 27K | 270K | 270万 |
| 30 | 300 | 3.0千 | 30K | 30万 | 300万 |
| 33 | 330 | 3.3K | 33K | 330K | 330万 |
| 36 | 360 | 3.6千 | 36K | 360K | 360万 |
| 39 | 390 | 3.9千 | 39K | 39万 | 390万 |
| 43 | 430 | 4.3千 | 43000 | 430K | 430万 |
| 47 | 470 | 4.7千 | 47K | 47万 | 470万 |
| 51 | 510 | 5.1千 | 51K | 510K | 510万 |
| 56 | 560 | 5.6千 | 56K | 560K | 560万 |
| 62 | 620 | 6.2千 | 62K | 620K | 620万 |
| 68 | 680 | 6.8千 | 68K | 68万 | 680万 |
| 75 | 750 | 7.5千 | 75K | 75万 | 750万 |
| 82 | 820 | 8.2千 | 82000 | 820K | 820万 |
| 91 | 910 | 9.1千 | 91千 | 910K | 910万 |
基于E96（1％公差）
| 1 | 10 | 100 | 1K | 10K | 100K |
| 1.02 | 10.2 | 102 | 1.02千 | 10.2千 | 102K |
| 1.05 | 10.5 | 105 | 1.05千 | 10.5千 | 105K |
| 1.07 | 10.7 | 107 | 1.07千 | 10.7千 | 107K |
| 1.1 | 11 | 110 | 1.1千 | 11K | 110K |
| 1.13 | 11.3 | 113 | 1.13千 | 11.3千 | 113K |
| 1.15 | 11.5 | 115 | 1.15千 | 11.5千 | 115K |
| 1.18 | 11.8 | 118 | 1.18千 | 11.8千 | 11.8万 |
| 1.21 | 12.1 | 121 | 1.21千 | 12.1千 | 121K |
| 1.24 | 12.4 | 124 | 1.24千 | 12.4千 | 124K |
| 1.27 | 12.7 | 127 | 1.27千 | 12.7千 | 127K |
| 1.3 | 13 | 130 | 1.3千 | 13K | 130K |
| 1.33 | 13.3 | 133 | 1.33千 | 13.3千 | 13.3万 |
| 1.37 | 13.7 | 137 | 1.37千 | 13.7千 | 13.7万 |
| 1.4 | 14 | 140 | 1.4千 | 14K | 140K |
| 1.43 | 14.3 | 143 | 1.43千 | 14.3千 | 143K |
| 1.47 | 14.7 | 147 | 1.47千 | 14.7千 | 14.7万 |
| 1.5 | 15 | 150 | 1.5千 | 15K | 150K |
| 1.54 | 15.4 | 154 | 1.54千 | 15.4千 | 15.4万 |
| 1.58 | 15.8 | 158 | 1.58千 | 15.8千 | 15.8万 |
| 1.62 | 16.2 | 162 | 1.62千 | 16.2千 | 162K |
| 1.65 | 16.5 | 165 | 1.65千 | 16.5千 | 16.5万 |
| 1.69 | 16.9 | 169 | 1.69千 | 16.9千 | 16.9万 |
| 1.74 | 17.4 | 174 | 1.74千 | 17.4千 | 17.4万 |
| 1.78 | 17.8 | 178 | 1.78千 | 17.8千 | 17.8万 |
| 1.82 | 18.2 | 182 | 1.82千 | 18.2千 | 182K |
| 1.87 | 18.7 | 187 | 1.87千 | 18.7千 | 18.7万 |
| 1.91 | 19.1 | 191 | 1.91千 | 19.1万 | 191K |
| 1.96 | 19.6 | 196 | 1.96千 | 19.6千 | 196K |
| 2 | 20 | 200 | 2K | 20K | 20万 |
| 2.05 | 20.5 | 205 | 2.05千 | 20.5千 | 20.5万 |
| 2.1 | 21 | 210 | 2.1千 | 21K | 21万 |
| 2.15 | 21.5 | 215 | 2.15千 | 21.5千 | 215K |
| 2.21 | 22.1 | 221 | 2.21千 | 22.1千 | 221K |
| 2.26 | 22.6 | 226 | 2.26千 | 22.6千 | 226K |
| 2.32 | 23.2 | 232 | 2.32千 | 23.2千 | 232K |
| 2.37 | 23.7 | 237 | 2.37千 | 23.7千 | 23.7万 |
| 2.43 | 24.3 | 243 | 2.43千 | 24.3千 | 24.3万 |
| 2.49 | 24.9 | 249 | 2.49千 | 24.9千 | 24.9万 |
| 2.55 | 25.5 | 255 | 2.55千 | 25.5千 | 255K |
| 2.61 | 26.1 | 261 | 2.61千 | 26.1千 | 261K |
| 2.67 | 26.7 | 267 | 2.67千 | 26.7千 | 26.7万 |
| 2.74 | 27.4 | 274 | 2.74千 | 27.4千 | 27.4万 |
| 2.8 | 28 | 280 | 2.8千 | 28K | 28万 |
| 2.87 | 28.7 | 287 | 2.87千 | 28.7千 | 28.7万 |
| 2.94 | 29.4 | 294 | 2.94千 | 29.4千 | 29.4万 |
| 3.01 | 30.1 | 301 | 3.01千 | 30.1千 | 301K |
| 3.09 | 30.9 | 309 | 3.09千 | 30.9千 | 30万9千 |
| 3.16 | 31.6 | 316 | 3.16千 | 31.6千 | 316K |
| 3.24 | 32.4 | 324 | 3.24千 | 32.4千 | 324K |
| 3.32 | 33.2 | 332 | 3.32千 | 33.2千 | 332K |
| 3.4 | 34 | 340 | 3.4千 | 34K | 34万 |
| 3.48 | 34.8 | 348 | 3.48千 | 34.8千 | 34.8万 |
| 3.57 | 35.7 | 357 | 3.57千 | 35.7千 | 35.7万 |
| 3.65 | 36.5 | 365 | 3.65千 | 36.5千 | 365K |
| 3.74 | 37.4 | 374 | 3.74千 | 37.4千 | 37.4万 |
| 3.83 | 38.3 | 383 | 3.83千 | 38.3千 | 383K |
| 3.92 | 39.2 | 392 | 3.92千 | 39.2千 | 392K |
| 4.02 | 40.2 | 402 | 4.02千 | 40.2千 | 402K |
| 4.12 | 41.2 | 412 | 4.12千 | 41.2千 | 412K |
| 4.22 | 42.2 | 422 | 4.22千 | 42.2千 | 422K |
| 4.32 | 43.2 | 432 | 4.32千 | 43.2千 | 432K |
| 4.42 | 44.2 | 442 | 4.42千 | 44.2千 | 442K |
| 4.53 | 45.3 | 453 | 4.53千 | 45.3千 | 453K |
| 4.64 | 46.4 | 464 | 4.64千 | 46.4千 | 46.4万 |
| 4.75 | 47.5 | 475 | 4.75千 | 47.5千 | 475K |
| 4.87 | 48.7 | 487 | 4.87千 | 48.7千 | 487千 |
| 4.99 | 49.9 | 499 | 4.99千 | 49.9千 | 49.9万 |
| 5.11 | 51.1 | 511 | 5.11千 | 51.1千 | 511K |
| 5.23 | 52.3 | 523 | 5.23千 | 52.3千 | 523K |
| 5.36 | 53.6 | 536 | 5.36千 | 53.6千 | 536K |
| 5.49 | 54.9 | 549 | 5.49千 | 54.9千 | 54.9万 |
| 5.62 | 56.2 | 562 | 5.62千 | 56.2千 | 562K |
| 5.76 | 57.6 | 576 | 5.76千 | 57.6千 | 576K |
| 5.9 | 59 | 590 | 5.9千 | 59K | 590K |
| 6.04 | 60.4 | 604 | 6.04千 | 60.4千 | 604K |
| 6.19 | 61.9 | 619 | 6.19千 | 61.9千 | 619K |
| 6.34 | 63.4 | 634 | 6.34千 | 63.4千 | 634K |
| 6.49 | 64.9 | 649 | 6.49千 | 64.9千 | 64.9万 |
| 6.65 | 66.5 | 665 | 6.65千 | 66.5千 | 665K |
| 6.81 | 68.1 | 681 | 6.81千 | 68.1千 | 681K |
| 6.98 | 69.8 | 698 | 6.98万 | 69.8千 | 698K |
| 7.15 | 71.5 | 715 | 7.15千 | 71.5千 | 715K |
| 7.32 | 73.2 | 732 | 7.32千 | 73.2千 | 732K |
| 7.5 | 75 | 750 | 7.5千 | 75K | 75万 |
| 7.68 | 76.8 | 768 | 7.68千 | 76.8千 | 768K |
| 7.87 | 78.7 | 787 | 7.87千 | 78.7千 | 787K |
| 8.06 | 80.6 | 806 | 8.06千 | 80.6千 | 806K |
| 8.25 | 82.5 | 825 | 8.25千 | 82.5千 | 825K |
| 8.45 | 84.5 | 845 | 8.45千 | 84.5千 | 845K |
| 8.66 | 86.6 | 866 | 8.66千 | 86.6千 | 866千 |
| 8.87 | 88.7 | 887 | 8.87千 | 88.7千 | 887K |
| 9.09 | 90.9 | 909 | 9.09千 | 90.9千 | 909K |
| 9.31 | 93.1 | 931 | 9.31千 | 93.1千 | 931K |
| 9.53 | 95.3 | 953 | 9.53千 | 95.3千 | 953K |
| 9.76 | 97.6 | 976 | 9.76千 | 97.6千 | 97.6万 |
通用电容值
基于E12（10％公差）
| 10pF | 100pF | 1000pF的 | .010µF | .10µF | 1.0µF | 10µF |
| 12pF | 120pF | 1200pF | .012µF | .12µF | 1.2µF | 12µF |
| 15pF | 150pF | 1500pF | .015µF | .15µF | 1.5µF | 15µF |
| 18pF | 180pF的 | 1800pF | .018µF | .18µF | 1.8µF | 18µF |
| 22pF | 220pF的 | 2200pF | .022µF | .22µF | 2.2µF | 22µF |
| 27pF | 270pF | 2700pF | .027µF | .27µF | 2.7µF | 27µF |
| 33pF | 330pF | 3300pF | .033µF | .33µF | 3.3µF | 33µF |
| 39pF | 390pF | 3900pF | .039µF | 0.39µF | 3.9µF | 39µF |
| 47pF | 470pF | 4700pF | .047µF | .47µF | 4.7µF | 47µF |
| 56pF的 | 560pF | 5600pF | .056µF | .56µF | 5.6µF的 | 56µF |
| 68pF | 680pF | 6800pF | .068µF | .68µF | 6.8µF | 68µF |
| 82pF | 820pF | 8200pF | .082µF | .82µF | 8.2µF | 82µF |