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美國(guó)線規(guī)（AWG）與公制、英制單位的對(duì)應(yīng)表格
AWG(AmericanWireGauge)其實(shí)是美制電線標(biāo)準(zhǔn)的簡(jiǎn)稱，AWG值是導(dǎo)線厚度（以英寸計(jì)）的函數(shù)。
| AWG | 外徑 | 截面積 | 電阻值 | AWG | 外徑 | 截面積 | 電阻值 | ||
| 公制mm | 英制inch | (mm2) | (W/km) | 公制mm | 英制inch | (mm2) | (W/km) | ||
| 4/0 | 11.68 | 0.46 | 107.22 | 0.17 | 22 | 0.643 | 0.0253 | 0.3247 | 54.3 |
| 3/0 | 10.4 | 0.4096 | 85.01 | 0.21 | 23 | 0.574 | 0.0226 | 0.2588 | 48.5 |
| 2/0 | 9.27 | 0.3648 | 67.43 | 0.26 | 24 | 0.511 | 0.0201 | 0.2047 | 89.4 |
| 1/0 | 8.25 | 0.3249 | 53.49 | 0.33 | 25 | 0.44 | 0.0179 | 0.1624 | 79.6 |
| 1 | 7.35 | 0.2893 | 42.41 | 0.42 | 26 | 0.404 | 0.0159 | 0.1281 | 143 |
| 2 | 6.54 | 0.2576 | 33.62 | 0.53 | 27 | 0.361 | 0.0142 | 0.1021 | 128 |
| 3 | 5.83 | 0.2294 | 26.67 | 0.66 | 28 | 0.32 | 0.0126 | 0.0804 | 227 |
| 4 | 5.19 | 0.2043 | 21.15 | 0.84 | 29 | 0.287 | 0.0113 | 0.0647 | 289 |
| 5 | 4.62 | 0.1819 | 16.77 | 1.06 | 30 | 0.254 | 0.01 | 0.0507 | 361 |
| 6 | 4.11 | 0.162 | 13.3 | 1.33 | 31 | 0.226 | 0.0089 | 0.0401 | 321 |
| 7 | 3.67 | 0.1443 | 10.55 | 1.68 | 32 | 0.203 | 0.008 | 0.0316 | 583 |
| 8 | 3.26 | 0.1285 | 8.37 | 2.11 | 33 | 0.18 | 0.0071 | 0.0255 | 944 |
| 9 | 2.91 | 0.1144 | 6.63 | 2.67 | 34 | 0.16 | 0.0063 | 0.0201 | 956 |
| 10 | 2.59 | 0.1019 | 5.26 | 3.36 | 35 | 0.142 | 0.0056 | 0.0169 | 1/200 |
| 11 | 2.3 | 0.0907 | 4.17 | 4.24 | 36 | 0.127 | 0.005 | 0.0127 | 1/530 |
| 12 | 2.05 | 0.0808 | 3.332 | 5.31 | 37 | 0.114 | 0.0045 | 0.0098 | 1/377 |
| 13 | 1.82 | 0.072 | 2.627 | 6.69 | 38 | 0.102 | 0.004 | 0.0081 | 2/400 |
| 14 | 1.63 | 0.0641 | 2.075 | 8.45 | 39 | 0.089 | 0.0035 | 0.0062 | 2/100 |
| 15 | 1.45 | 0.0571 | 1.646 | 10.6 | 40 | 0.079 | 0.0031 | 0.0049 | 4/080 |
| 16 | 1.29 | 0.0508 | 1.318 | 13.5 | 41 | 0.071 | 0.0028 | 0.004 | 3/685 |
| 17 | 1.15 | 0.0453 | 1.026 | 16.3 | 42 | 0.064 | 0.0025 | 0.0032 | 6/300 |
| 18 | 1.02 | 0.0403 | 0.8107 | 21.4 | 43 | 0.056 | 0.0022 | 0.0025 | 5/544 |
| 19 | 0.912 | 0.0359 | 0.5667 | 26.9 | 44 | 0.051 | 0.002 | 0.002 | 10/200 |
| 20 | 0.813 | 0.032 | 0.5189 | 33.9 | 45 | 0.046 | 0.0018 | 0.0016 | 9/180 |
| 21 | 0.724 | 0.0285 | 0.4116 | 42.7 | 46 | 0.041 | 0.0016 | - | - |
其中，4/0表示0000，3/0表示000，2/0表示00，1/0表示0。例如，常用的電話線直徑為26AWG，約為0.4mm。
線規(guī)對(duì)照表
| 中國(guó)線規(guī) | 美國(guó)線規(guī) | 中國(guó)線規(guī) | 美國(guó)線規(guī) | |||
| CWG | AWG | CWG | AWG | |||
| 直徑mm | 線號(hào) | 直徑mm | 直徑mm | 線號(hào) | 直徑mm | |
| - | 0 | 11.693 | 0.9 | 19 | 0.912 | |
| - | 0 | 10.422 | 0.8 | 20 | 0.812 | |
| - | - | - | 0.71 | 21 | 0.723 | |
| 9 | 2/0(00) | 9.266 | 0.63 | 22 | 0.644 | |
| 8 | 1/0(0) | 8.251 | - | - | - | |
| 7.1 | 1 | 7.348 | 0.56 | 23 | 0.573 | |
| 6.3 | 2 | 6.544 | 0.5 | 24 | 0.511 | |
| - | - | - | 0.45 | 25 | 0.455 | |
| 5.6 | 3 | 5.827 | 0.4 | 26 | 0.405 | |
| 5 | 4 | 5.189 | - | - | - | |
| 4.5 | 5 | 4.621 | 0.355 | 27 | 0.361 | |
| 4 | 6 | 4.115 | 0.315 | 28 | 0.321 | |
| - | - | - | 0.28 | 29 | 0.286 | |
| 3.55 | 7 | 3.665 | 0.25 | 30 | 0.255 | |
| 3.15 | 8 | 3.264 | - | - | - | |
| 2.8 | 9 | 3.906 | 0.224 | 31 | 0.227 | |
| 2.5 | 10 | 2.588 | 0.2 | 32 | 0.202 | |
| - | - | - | 0.18 | 33 | 0.18 | |
| 2.24 | 11 | 2.305 | 0.16 | 34 | 0.16 | |
| 2 | 12 | 2.053 | - | - | - | |
| 1.8 | 13 | 1.828 | 0.14 | 35 | 0.143 | |
| 1.6 | 14 | 1.628 | 0.125 | 36 | 0.127 | |
| - | - | - | 0.112 | 37 | 0.113 | |
| 1.4 | 15 | 1.45 | - | 38 | 0.102 | |
| 1.25 | 16 | 1.291 | - | - | - | |
| 1.12 | 17 | 1.15 | - | 39 | 0.089 | |
| 1 | 18 | 1.024 | - | 40 | 0.079 | |
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