Wire Gauge Reference Table

SWG = Standard or Sterling Wire Gauge, a British wire measurement system.

BWG = Birmingham Wire Gauge, an old British wire measurement system that was widely used throughout the world.

Cir Mils or CMA = Circular Mil Area which is equal to 1/1000 (0.001) of an inch in diameter or 0.000507 MM.

AWG/SWG/BWG/MM Bare Dia. (Inch) Bare Dia. (MM) AWG No. SWG No. BWG No.6/0 AWG 0.580000 1,473,200 6/0 - - - -5/0 AWG 0.516500 1,311,910 5/0 7/0 - -7/0 SWG 0.500000 1,270,000 5/0 7/0 - -6/0 SWG 0.464000 1,178,560 4/0 6/0 4/04/0 AWG 0.460000 1,168,400 4/0 4/0 4/04/0 BWG 0.454000 1,153,160 4/0 4/0 4/05/0 SWG 0.432000 1,097,280 4/0 5/0 3/03/0 BWG 0.425000 1,079,500 3/0 3/0 3/03/0 AWG 0.409600 1,040,384 3/0 3/0 3/04/0 SWG 0.400000 1,016,000 4/0 4/0 4/02/0 BWG 0.380000 965,200 2/0 2/0 2/03/0 SWG 0.372000 944,880 3/0 3/0 3/02/0 AWG 0.364800 926,592 2/0 2/0 2/02/0 SWG 0.348000 883,920 2/0 2/0 2/00 BWG 0.340000 863,600 0 0 00 AWG 0.324900 825,246 0 0 00 SWG 0.324000 822,960 0 0 01 SWG 0.300000 762,000 1 1 11 BWG 0.300000 762,000 1 1 11 AWG 0.289300 734,822 1 1 12 BWG 0.283000 718,820 2 2 22 SWG 0.276000 701,040 2 2 21.5 AWG 0.273003 693,428 1.5 2 23 BWG 0.259000 657,860 2 3 32 AWG 0.258000 655,320 2 2 33 SWG 0.252000 640,080 2 3 32.5 AWG 0.243116 617,515 2.5 3 44 BWG 0.238000 604,520 3 4 44 SWG 0.232000 589,280 3 4 43 AWG 0.229000 581,660 3 4 55 BWG 0.220000 558,800 3 5 53.5 AWG 0.216501 549,913 3.5 4 65 SWG 0.212000 538,480 4 5 54 AWG 0.204000 518,160 4 5 66 BWG 0.203000 515,620 4 6 64.5 AWG 0.192800 489,712 4.5 6 75 AWG 0.182000 462,280 5 7 7

All Gauge measurements throughout this website are American Wire Gauge (AWG). Diameter information in the table applies to solid wires. Stranded wires are calculated by calculating the equivalent cross sectional copper area. Gauges stocked are highlighted below in bold.

American Wire Gauge (AWG) is a system of numerical wire sizes that start with the lowest numbers (6/0) for the largest sizes. The gauge sizes are each 20.6% apart based on the cross sectional area. AWG is also known as Brown & Sharpe Gage.

7 BWG 0.179000 454,660 5 8 75.5 AWG 0.171693 436,100 5.5 7 88 BWG 0.164000 416,560 6 8 86 AWG 0.162023 411,538 6 7 86.5 AWG 0.152897 388,358 6.5 9 99 BWG 0.147000 373,380 7 9 97 AWG 0.144285 366,484 7 9 99 SWG 0.144000 365,760 7 9 97.5 AWG 0.136459 346,606 7.5 9 1010 BWG 0.134000 340,360 8 10 103.35 MM 0.131890 334,999 8 9 108 AWG 0.128500 326,390 8 10 1010 SWG 0.128000 325,120 8 10 103.15 MM 0.124016 314,999 8 10 118.5 AWG 0.121253 307,983 8.5 10 1111 BWG 0.120000 304,800 9 11 113 MM 0.118110 299,999 9 10 1111 SWG 0.116000 294,640 9 11 119 AWG 0.114400 290,576 9 11 112.8 MM 0.110236 279,999 9 11 1212 BWG 0.109000 276,860 10 12 129.5 AWG 0.107979 274,267 9.5 11 122.65 MM 0.104331 264,999 10 11 1212 SWG 0.104000 264,160 10 12 1210 AWG 0.101900 258,826 10 12 122.5 MM 0.098425 250,000 10 12 1310.5 AWG 0.096158 244,241 10.5 12 1313 BWG 0.095000 241,300 11 13 132.36 MM 0.092913 236,000 11 12 1313 SWG 0.092000 233,680 11 13 1311 AWG 0.090700 230,378 11 13 132.24 MM 0.088189 224,000 11 13 1411.5 AWG 0.085800 217,932 11.5 13 142.12 MM 0.083464 212,000 12 14 1414 BWG 0.083000 210,820 12 14 1412 AWG 0.080800 205,232 12 14 1414 SWG 0.080000 203,200 12 14 142 MM 0.078740 200,000 12 14 1512.5 AWG 0.076400 194,056 12.5 14 151.9 MM 0.074803 190,000 13 15 1513 AWG 0.072000 182,880 13 15 1515 SWG 0.072000 182,880 13 15 1515 BWG 0.072000 182,880 13 15 151.8 MM 0.070866 180,000 13 15 1613.5 AWG 0.068100 172,974 13.5 15 161.7 MM 0.066929 170,000 14 16 1616 BWG 0.065000 165,100 14 16 1614 AWG 0.064100 162,814 14 16 1616 SWG 0.064000 162,560 14 16 161.6 MM 0.062992 160,000 14 16 1714.5 AWG 0.060500 153,670 14.5 16 171.5 MM 0.059055 150,000 15 17 1717 BWG 0.058000 147,320 15 17 1715 AWG 0.057100 145,034 15 17 17

17 SWG 0.056000 142,240 15 17 171.4 MM 0.055118 140,000 15 17 1815.5 AWG 0.053900 136,906 15.5 16 181.32 MM 0.051968 132,000 16 17 181.3 MM 0.051200 130,048 16 18 1816 AWG 0.050800 129,032 16 18 181.25 MM 0.049213 125,000 16 18 1818 BWG 0.049000 124,460 16 18 1818 SWG 0.048000 121,920 16 18 1816.5 AWG 0.048000 121,920 16.5 17 191.2 MM 0.047200 119,888 17 18 191.18 MM 0.046457 118,000 17 18 1917 AWG 0.045300 115,062 17 18 191.15 MM 0.045275 114,999 17 18 191.12 MM 0.044094 112,000 17 19 191.1 MM 0.043300 109,982 17 19 2017.5 AWG 0.042700 108,458 17.5 18 2019 BWG 0.042000 106,680 18 19 191.06 MM 0.041732 106,000 18 19 2018 AWG 0.040300 102,362 18 19 2019 SWG 0.040000 101,600 18 19 191 MM 0.039370 100,000 18 20 2018.5 AWG 0.038000 0.96520 18.5 19 21.95 MM 0.037402 0.95000 19 20 2120 SWG 0.036000 0.91440 19 20 2019 AWG 0.035900 0.91186 19 20 21.9 MM 0.035433 0.90000 19 20 2120 BWG 0.035000 0.88900 19 20 2019.5 AWG 0.033900 0.86106 19.5 20 22.85 MM 0.033465 0.85000 20 21 2120 AWG 0.032000 0.81280 20 21 2121 SWG 0.032000 0.81280 20 21 21.8 MM 0.031496 0.80000 20 21 2221 BWG 0.031000 0.78740 20 21 2120.5 AWG 0.030200 0.76708 20.5 21 22.75 MM 0.029528 0.75000 21 22 2221 AWG 0.028500 0.72390 21 22 2222 SWG 0.028000 0.71120 21 22 2222 BWG 0.028000 0.71120 21 22 22.71 MM 0.027953 0.71000 21 22 22.7 MM 0.027600 0.70104 21 22 2321.5 AWG 0.026900 0.68326 21.5 22 23.65 MM 0.025600 0.65024 22 23 2322 AWG 0.025300 0.64262 22 23 2323 BWG 0.025000 0.63500 22 23 23.63 MM 0.024803 0.63000 22 23 2323 SWG 0.024000 0.60960 22 23 2322.5 AWG 0.023900 0.60706 22.5 23 24.6 MM 0.023622 0.60000 23 23 2424 BWG 0.023000 0.58420 23 24 2423 AWG 0.022600 0.57404 23 24 24.56 MM 0.022100 0.56134 23 24 2424 SWG 0.022000 0.55880 23 24 24.55 MM 0.021700 0.55118 24 25 25

23.5 AWG 0.021300 0.54102 23.5 24 2524 AWG 0.020100 0.51054 24 25 2525 SWG 0.020000 0.50800 24 25 2525 BWG 0.020000 0.50800 24 25 25.5 MM 0.019685 0.50000 24 25 2524.5 AWG 0.019000 0.48260 24.5 25 2626 SWG 0.018000 0.45720 25 26 2626 BWG 0.018000 0.45720 21 22 2625 AWG 0.017900 0.45466 25 26 26.45 MM 0.017717 0.45000 25 26 2725.5 AWG 0.016900 0.42926 25.5 26 27.425 MM 0.016732 0.42500 26 27 2727 SWG 0.016400 0.41656 26 27 2727 BWG 0.016000 0.40640 26 27 2726 AWG 0.015900 0.40386 26 27 27.4 MM 0.015748 0.40000 26 27 2826.5 AWG 0.015000 0.38100 26.5 27 2828 SWG 0.014800 0.37592 27 28 2827 AWG 0.014200 0.36068 27 28 28.355 MM 0.013976 0.35500 27 28 2929 SWG 0.013600 0.34544 27 29 2928 BWG 0.013500 0.34290 28 28 2827.5 AWG 0.013400 0.34036 27.5 29 2929 BWG 0.013000 0.33020 28 29 2928 AWG 0.012600 0.32004 28 30 29.315 MM 0.012402 0.31500 28 30 3030 SWG 0.012400 0.31496 28 30 3030 BWG 0.012000 0.30480 29 30 3028.5 AWG 0.011900 0.30226 28.5 30 30.31 MM 0.011800 0.29972 29 31 3131 SWG 0.011600 0.29464 29 31 3129 AWG 0.011300 0.28702 29 31 30.28 MM 0.011024 0.28000 29 32 3232 SWG 0.010800 0.27432 29 32 3229.5 AWG 0.010600 0.26924 29.5 32 3130 AWG 0.010000 0.25400 30 33 3133 SWG 0.010000 0.25400 30 33 3331 BWG 0.010000 0.25400 30 33 31.25 MM 0.009843 0.25000 30 33 3230.5 AWG 0.009500 0.24130 30.5 33 3234 SWG 0.009200 0.23368 31 34 3432 BWG 0.009000 0.22860 31 31 3231 AWG 0.008900 0.22606 31 34 32.224 MM 0.008819 0.22400 31 35 3335 SWG 0.008400 0.21336 32 35 3531.5 AWG 0.008400 0.21336 31.5 34 3332 AWG 0.008000 0.20320 32 35 3333 BWG 0.008000 0.20320 32 35 33.2 MM 0.007874 0.20000 32 36 3436 SWG 0.007600 0.19304 32 36 3632.5 AWG 0.007500 0.19050 32.5 35 3433 AWG 0.007100 0.18034 33 36 34.18 MM 0.007087 0.18000 33 36 3535 BWG 0.007000 0.17780 33 36 35

37 SWG 0.006800 0.17272 33 37 3433.5 AWG 0.006700 0.17018 33.5 36 3434 AWG 0.006300 0.16002 34 37 34.16 MM 0.006299 0.16000 34 37 3638 SWG 0.006000 0.15240 34 38 3634.5 AWG 0.005900 0.14986 34.5 37 3535 AWG 0.005600 0.14224 35 38 35.14 MM 0.005512 0.14000 35 38 3535.5 AWG 0.005300 0.13462 35.5 38 3539 SWG 0.005200 0.13208 36 39 3536 AWG 0.005000 0.12700 36 39 3535 BWG 0.005000 0.12700 36 39 35.125 MM 0.004921 0.12500 36 39 3540 SWG 0.004800 0.12192 36 40 3536.5 AWG 0.004700 0.11938 36.5 39 3537 AWG 0.004500 0.11430 37 40 35.112 MM 0.004409 0.11200 37 40 3641 SWG 0.004400 0.11176 37 41 3637.5 AWG 0.004200 0.10668 37.5 41 3638 AWG 0.004000 0.10160 38 42 3642 SWG 0.004000 0.10160 38 42 3636 BWG 0.004000 0.10160 38 40 36.1 MM 0.003937 0.10000 38 42 - -38.5 AWG 0.003700 0.09398 38.5 42 - -43 SWG 0.003600 0.09144 39 43 - -.09 MM 0.003543 0.09000 39 43 - -39 AWG 0.003500 0.08890 39 43 - -39.5 AWG 0.003300 0.08382 39.5 43 - -44 SWG 0.003200 0.08128 40 44 - -.08 MM 0.003150 0.08000 40 44 - -40 AWG 0.003100 0.07874 40 44 - -40.5 AWG 0.003000 0.07620 40.5 44 - -41 AWG 0.002800 0.07112 41 45 - -45 SWG 0.002800 0.07112 41 45 - -.071 MM 0.002795 0.07100 41 45 - -41.5 AWG 0.002600 0.06604 41.5 45 - -42 AWG 0.002500 0.06350 42 46 - -.063 MM 0.002480 0.06300 42 46 - -46 SWG 0.002400 0.06096 42 46 - -42.5 AWG 0.002400 0.06096 42.5 46 - -43 AWG 0.002200 0.05588 43 46 - -43.5 AWG 0.002100 0.05334 43.5 47 - -44 AWG 0.002000 0.05080 44 47 - -47 SWG 0.002000 0.05080 44 47 - -.05 MM 0.001969 0.05000 44 47 - -44.5 AWG 0.001866 0.04740 44.5 47 - -45 AWG 0.001761 0.04473 45 47 - -45.5 AWG 0.001662 0.04221 45.5 48 - -48 SWG 0.001600 0.04064 45.5 48 - -46 AWG 0.001568 0.03983 46 48 - -46.5 AWG 0.001480 0.03759 46.5 48 - -47 AWG 0.001397 0.03548 47 48 - -47.5 AWG 0.001318 0.03348 47.5 48 - -48 AWG 0.001244 0.03160 48 49 - -

49 SWG 0.001200 0.03048 48 49 - -48.5 AWG 0.001174 0.02982 48.5 49 - -49 AWG 0.001108 0.02814 49 49 - -49.5 AWG 0.001045 0.02654 49.5 49 - -50 SWG 0.001000 0.02540 49 50 - -50 AWG 0.000986 0.02505 50 50 - -50.5 AWG 0.000931 0.02364 50.5 50 - -51 AWG 0.000878 0.02231 51 - - - -51.5 AWG 0.000829 0.02105 51.5 - - - -52 AWG 0.000782 0.01987 52 - - - -52.5 AWG 0.000738 0.01875 52.5 - - - -53 AWG 0.000697 0.01769 53 - - - -53.5 AWG 0.000657 0.01670 53.5 - - - -54 AWG 0.000620 0.01576 54 - - - -54.5 AWG 0.000585 0.01487 54.5 - - - -55 AWG 0.000552 0.01403 55 - - - -55.5 AWG 0.000521 0.01324 55.5 - - - -56 AWG 0.000492 0.01249 56 - - - -56.5 AWG 0.000464 0.01179 56.5 - - - -57 AWG 0.000438 0.01113 57 - - - -57.5 AWG 0.000413 0.01050 57.5 - - - -58 AWG 0.000390 0.00991 58 - - - -58.5 AWG 0.000368 0.00935 58.5 - - - -59 AWG 0.000347 0.00882 59 - - - -59.5 AWG 0.000328 0.00833 59.5 - - - -60 AWG 0.000309 0.00786 60 - - - -

Wire Gauge Reference Table

SWG = Standard or Sterling Wire Gauge, a British wire measurement system.

BWG = Birmingham Wire Gauge, an old British wire measurement system that was widely used throughout the world.

Cir Mils or CMA = Circular Mil Area which is equal to 1/1000 (0.001) of an inch in diameter or 0.000507 MM.

Circular Mils336,390.338592266,764.588301249,992.820000215,289.816699211,593.922848206,110.080348186,618.640159180,619.812450167,767.341584159,995.404800144,395.852832138,380.025612133,075.217970121,100.521893115,596.679968105,556.978317104,972.98508989,997.41520089,997.41520083,692.08629480,086.69984476,173.81222574,528.49748967,079.07343466,562.08828263,502.17616559,103.69194956,642.37318453,822.45417552,439.49389448,398.60995246,871.33681844,942.70920841,614.80478841,207.81647837,170.77242533,123.048679

All Gauge measurements throughout this website are American Wire Gauge (AWG). Diameter information in the table applies to solid wires. Stranded wires are calculated by calculating the equivalent cross sectional copper

American Wire Gauge (AWG) is a system of numerical wire sizes that start with the lowest numbers (6/0) for the largest sizes. The gauge sizes are each 20.6% apart based on the cross sectional area. AWG is also known as

32,040.07978229,477.63962726,895.22754726,250.69858723,376.82120721,608.37939020,817.56332720,735.40446218,620.52388417,955.48430417,394.34063016,511.77576816,383.52945215,379.40253114,701.86775914,399.58643213,949.57145713,455.61354413,086.98413112,151.62669111,880.65877811,659.12958110,884.54061710,815.68936410,383.3117839,687.2024019,246.0954099,024.7408028,632.6147988,463.7569148,226.2537357,777.0410827,361.4285746,966.1059956,888.8021486,528.4524976,399.8161926,199.8095365,836.7923635,595.3281075,183.8511165,183.8511165,183.8511165,021.8457244,637.4768084,479.3623904,224.8786584,108.6919954,095.8823633,967.8781033,660.1448783,487.3928643,363.9033863,260.316361

3,135.9099343,037.9066732,905.1265622,700.6370342,621.3647122,580.5658842,421.8006002,400.9310432,303.9338292,303.9338292,227.7760162,158.1537002,052.0310642,049.7667541,944.2602711,874.8361531,823.2376351,763.9493381,741.5264991,624.0433561,599.9540481,549.9523841,443.9585281,398.8320271,295.9627791,288.7729851,255.4614311,224.9648181,149.1769951,119.8405981,023.9705911,023.970591

991,969,526960,972,400912,013,806871,848,216812,226,672783,977,484783,977,484781,330,997761,738,122723,589,218655,341,178640,071,617624,982,050615,176,101575,983,457571,193,595557,982,858528,984,807510,745,331488,395,973483,986,100470,876,476

453,676,970403,998,397399,988,512399,988,512387,488,096360,989,632323,990,695323,990,695320,400,798313,865,358285,601,797279,960,149268,952,275255,992,648252,802,739247,992,381224,993,538219,033,709201,634,209195,332,749184,954,688182,244,766179,554,843168,995,146158,755,440153,794,025153,755,584143,995,864141,605,933139,236,001134,556,135127,686,333121,516,267116,636,650112,356,773

99,997,12899,997,12899,997,12896,872,02490,247,40884,637,56980,997,67479,207,72577,770,41170,557,97470,557,97463,998,16263,998,16261,998,09557,758,34156,248,38550,408,55250,218,45748,998,593

46,238,67244,888,71139,688,86039,678,78135,998,96634,809,00031,359,09930,379,06728,089,19327,039,22324,999,28224,999,28224,218,00623,039,33822,089,36620,249,41819,442,60319,359,44417,639,49315,999,54015,999,54015,999,54015,499,52413,689,60712,959,62812,554,61412,249,64810,889,68710,239,706

9,919,6959,609,7248,999,7427,839,7757,839,7757,813,3106,759,8066,249,8216,151,7615,759,8355,759,8354,839,8614,409,8733,999,8853,999,8853,874,8813,481,8563,101,0322,762,1652,559,9262,458,5532,190,3371,951,5531,737,0741,547,492

1,439,9591,378,2361,227,6291,091,994

0.9999710.9727600.8663640.7713890.6870550.6118190.5447760.4852380.4320310.3847610.3426830.3051370.2717460.2419590.2154750.1919260.1708950.1521740.1354940.1206830.1074500.095726

Wire Gauge Reference Table

SWG = Standard or Sterling Wire Gauge, a British wire measurement system.

BWG = Birmingham Wire Gauge, an old British wire measurement system that was widely used throughout the world.

Cir Mils or CMA = Circular Mil Area which is equal to 1/1000 (0.001) of an inch in diameter or 0.000507 MM.

 wires. Stranded wires are calculated by calculating the equivalent cross sectional copper

American Wire Gauge (AWG) is a system of numerical wire sizes that start with the lowest numbers (6/0) for the largest sizes. The gauge sizes are each 20.6% apart based on the cross sectional area. AWG is also known as

S.W.G. Wire Number A.W.G. or B&S A.W.G. Metric

(Inches) (Gauge) (Inches) (MM)

0.500 0000000 (7/0) ....................... ............

0.464 000000 (6/0) 0.580000 ............

0.432 00000 (5/0) 0.516500 ............

0.400 0000 (4/0) 0.460000 11.684

0.372 000 (3/0) 0.409642 10.404

0.348 00 (2/0) 0.364796 9.266

0.324 0 (1/0) 0.324861 8.252

0.300 1 0.289297 7.348

0.276 2 0.257627 6.543

0.252 3 0.229423 5.827

0.232 4 0.2043 5.189

0.2120 5 0.1819 4.621

0.1920 6 0.1620 4.115

0.1760 7 0.1443 3.665

0.1600 8 0.1285 3.264

0.1440 9 0.1144 2.906

0.1280 10 0.1019 2.588

0.1160 11 0.0907 2.304

0.1040 12 0.0808 2.052

S.W.G. Wire Number A.W.G. or B&S A.W.G. Metric

0.0920 13 0.0720 1.829

0.0800 14 0.0641 1.628

0.0720 15 0.0571 1.45

0.0640 16 0.0508 1.291

0.0560 17 0.0453 1.15

0.0480 18 0.0403 1.024

0.0400 19 0.0359 0.9119

0.0360 20 0.0320 0.8128

0.0320 21 0.0285 0.7239

0.0280 22 0.0253 0.6426

0.0240 23 0.0226 0.574

0.0220 24 0.0201 0.5106

0.0200 25 0.0179 0.4547

0.0180 26 0.0159 0.4038

0.0164 27 0.0142 0.3606

0.0148 28 0.0126 0.32

0.0136 29 0.0113 0.287

0.0124 30 0.0100 0.254

0.0116 31 0.0089 0.2261

0.0108 32 0.0080 0.2032

0.0100 33 0.0071 0.1803

S.W.G. Wire Number A.W.G. or B&S A.W.G. Metric

0.0092 34 0.0063 0.1601

0.0084 35 0.0056 0.1422

0.0076 36 0.0050 0.127

0.0068 37 0.0045 0.1143

0.0060 38 0.0040 0.1016

0.0052 39 0.0035 0.0889

0.0048 40 0.0031 0.0787

0.0044 41 0.0028 0.0711

0.0040 42 0.0025 0.0635

0.0036 43 0.0022 0.0559

0.0032 44 0.0020 0.0508

0.0028 45 0.0018 0.0457

0.0024 46 0.0016 0.0406

0.0020 47 0.0014 0.035

0.0016 48 0.0012 0.0305

0.0012 49 0.0011 0.0279

0.0010 50 0.0010 0.0254

51 0.00088 0.0224

52 0.00078 0.0198

53 0.00070 0.0178

54 0.00062 0.0158

55 0.00055 0.014

56 0.00049 0.0124

      

SWGWire Num

AWGin mm mm2 in mm mm2

0.232 5.89 27,247 4 0.204 5.19 21,1550.212 5.38 22,732 5 0.182 4.62 16,7630.192 4.88 18,703 6 0.162 4.11 13,2670.176 4.47 15,692 7 0.144 3.66 10.520.16 4.06 12,946 8 0.128 3.26 8,3460.144 3.66 10.52 9 0.114 2.9 6,6050.128 3.25 8,295 10 0.102 2.59 5,2680.116 2.95 6,834 11 0.091 2.3 4,1540.104 2.64 5,473 12 0.081 2.05 3.30.092 2.34 4.3 13 0.072 1.83 2.630.081 2.03 3,236 14 0.064 1.63 2,0860.072 1.83 2.63 15 0.057 1.45 1,6510.064 1.63 2,086 16 0.051 1.29 1,3060.056 1.42 1,583 17 0.045 1.15 1,0380.048 1.22 1,168 18 0.04 1.02 0.8170.04 1.02 0.817 19 0.036 0.91 0.650.036 0.92 0.664 20 0.032 0.81 0.5150.032 0.81 0.515 21 0.028 0.72 0.4070.028 0.71 0.395 22 0.025 0.64 0.3210.024 0.61 0.292 23 0.023 0.57 0.2550.023 0.56 0.246 24 0.02 0.51 0.2040.02 0.51 0.204 25 0.018 0.45 0.1590.018 0.46 0.166 26 0.016 0.4 0.1250.016 0.41 0.132 27 0.014 0.36 0.1010.014 0.38 0.101 28 0.013 0.32 0.080.013 0.35 0.096 29 0.011 0.29 0.0660.012 0.305 0.073 30 0.01 0.25 0.0490.011 0.29 0.066 31 0.09 0.229 0.0410.0106 0.27 0.057 32 0.008 0.203 0.0320.01 0.254 0.05 33 0.007 0.178 0.0240.009 0.229 0.041 34 0.0063 0.16 0.020.008 0.203 0.032 35 0.0056 0.14 0.0150.007 0.178 0.024 36 0.005 0.127 0.0120.0067 0.17 0.022 37 0.0044 0.11 0.0090.006 0.15 0.017 38 0.004 0.102 0.0080.005 0.127 0.012 39 0.0035 0.09 0.0060.0047 0.12 0.011 40 0.0031 0.08 0.005

AWG gauge

Conductor Conductor

OOOO 0.46 11,684 0.049 0.16072 380 302OOO 0.4096 1,040,384 0.0618 0.202704 328 239OO 0.3648 926,592 0.0779 0.255512 283 190

0 0.3249 825,246 0.0983 0.322424 245 1501 0.2893 734,822 0.1239 0.406392 211 1192 0.2576 654,304 0.1563 0.512664 181 943 0.2294 582,676 0.197 0.64616 158 754 0.2043 518,922 0.2485 0.81508 135 605 0.1819 462,026 0.3133 1,027,624 118 476 0.162 41,148 0.3951 1,295,928 101 377 0.1443 366,522 0.4982 1,634,096 89 308 0.1285 32,639 0.6282 2,060,496 73 249 0.1144 290,576 0.7921 2,598,088 64 19

10 0.1019 258,826 0.9989 3,276,392 55 1511 0.0907 230,378 1.26 41,328 47 1212 0.0808 205,232 1,588 520,864 41 9.313 0.072 18,288 2,003 656,984 35 7.414 0.0641 162,814 2,525 8,282 32 5.915 0.0571 145,034 3,184 1,044,352 28 4.716 0.0508 129,032 4,016 1,317,248 22 3.717 0.0453 115,062 5,064 1,660,992 19 2.918 0.0403 102,362 6,385 209,428 16 2.319 0.0359 0.91186 8,051 2,640,728 14 1.820 0.032 0.8128 10.15 33,292 11 1.521 0.0285 0.7239 12.8 41,984 9 1.222 0.0254 0.64516 16.14 529,392 7 0.9223 0.0226 0.57404 20.36 667,808 4.7 0.72924 0.0201 0.51054 25.67 841,976 3.5 0.57725 0.0179 0.45466 32.37 1,061,736 2.7 0.45726 0.0159 0.40386 40.81 1,338,568 2.2 0.36127 0.0142 0.36068 51.47 1,688,216 1.7 0.28828 0.0126 0.32004 64.9 212,872 1.4 0.22629 0.0113 0.28702 81.83 2,684,024 1.2 0.18230 0.01 0.254 103.2 338,496 0.86 0.14231 0.0089 0.22606 130.1 426,728 0.7 0.11332 0.008 0.2032 164.1 538,248 0.53 0.091

Metric 2.0 0.00787 0.200 169.39 555.61 0.51 0.08833 0.0071 0.18034 206.9 678,632 0.43 0.072

Metric 1.8 0.00709 0.180 207.5 680.55 0.43 0.07234 0.0063 0.16002 260.9 855,752 0.33 0.056

Metric 1.6 0.0063 0.16002 260.9 855,752 0.33 0.05635 0.0056 0.14224 329 1079.12 0.27 0.044

Metric 1.4 .00551 .140 339 1114 0.26 0.04336 0.005 0.127 414.8 1360 0.21 0.035

Ohms per 1000 ft.

Ohms per km

Maximum amps for chassis wiring

Maximum amps for 

Diameter Inches

Diameter mm

power transmission

Metric 1.25 .00492 0.125 428.2 1404 0.20 0.03437 0.0045 0.1143 523.1 1715 0.17 0.0289

Metric 1.12 .00441 0.112 533.8 1750 0.163 0.027738 0.004 0.1016 659.6 2163 0.13 0.0228

Metric 1 .00394 0.1000 670.2 2198 0.126 0.022539 0.0035 0.0889 831.8 2728 0.11 0.017540 0.0031 0.07874 1049 3440 0.09 0.0137

Diameter Diameter CrossSWG

BWG AWGmm Inches Sectional or or

Stubs*14,732 0.5800 17,045,625 6/0

131,191 0.5165 1,351,754 5/012.70 0.5000 1,266,767 0 5/0

12,446 0.4900 121,660 7/012,303 0.4844 118.911.90 0.4688 111.36

117,856 0.464 109,092 0117,221 0.4615 107.92 6/011,684 0.4600 107,219 4/0

115,316 0.454 104,452 4/011,508 0.4531 104.0311.11 0.4375 96.99

109,728 0.432 945,637 0109,347 0.4305 93,908 5/010,795 0.425 91,524 3/010.72 0.4219 90.1910.50 0.4134 86,590

1,040,384 0.4096 85.01 3/0103,175 0.4062 83.60

10.30 0.4055 83.3210,160 0.400 81,073 010.10 0.3976 80.12

1,000,252 0.3938 78.54 4/09.92 0.3906 77.30

9,652 0.380 73,168 2/09,525 0.3750 71.26

94,488 0.372 70.12 09.30 0.3661 67.93

926,592 0.3648 67,432 2/092,075 0.3625 66.58 3/09,129 0.3594 65.459.10 0.3583 65.04

88,392 0.348 61.36 08.80 0.3465 60.828.73 0.3438 59.89

8,636 0.340 58.58 1/08.60 0.3386 58.09

84,074 0.3310 55.52 2/08,400 0.3307 55.42

825,246 0.3249 53.49 1/0

W & MArea mm2 B & S

8.23 0.3240 53.19 08.20 0.3228 52.818.00 0.315 50.27

79,375 0.3125 49,48377,851 0.3065 47.60 1/0

7.70 0.3031 46.577.62 0.3000 45.60 1 1

7,541 0.2969 44,6667.50 0.2953 44.187.40 0.2913 43.00

7,348 0.2893 42.41 172,136 0.284 40.87 27,188 0.2830 40.58 17,142 0.2812 40.077.01 0.276 38.59 27.00 0.2756 38.486.90 0.2717 37.39

6,746 0.2656 35.746,667 0.2625 34.92 26.60 0.2598 34.21

6,579 0.259 33.99 36,543 0.2576 33.62 26.50 0.2559 33.186.40 0.252 32.17 3

6,350 0.250 31.676.20 0.2441 30.196.19 0.2437 30.09 36.10 0.2402 29.22

6,045 0.238 28.70 46.00 0.2362 28.275.94 0.2344 27.845.89 0.232 27.25 4

5,827 0.2294 26.66 35.8 0.2283 26.42

5,723 0.2253 25.72 45,588 0.220 24.52 5

555,625 0.21875 24,2465.38 0.212 22.73 55.30 0.2087 22.06

5,258 0.2070 21.71 55.20 0.2047 21,237

5,189 0.2043 21.15 45,156 0.203 20.88 65.10 0.2008 20,4285.00 0.1968 19,6354.90 0.1929 18,8574.88 0.192 18.70 6 64.80 0.189 18,095

47,625 0.1875 17.814.70 0.185 17,3494.62 0.1819 1,676,385 5

4,572 0.180 16.42 74,496 0.1770 15,875 74.47 0.176 15.69 7

4.40 0.1732 15.204,366 0.1719 14.974.30 0.1693 14.524.19 0.165 13,795 8

4,115 0.162 13,298 8 64.10 0.1614 13.204.06 0.160 12.95 84.00 0.1575 12,566

3,969 0.15625 12,3703.90 0.1535 11,9463.80 0.1496 11.343.76 0.148 11,099 9 9

37,338 0.147 10,9493.66 0.144 10.52 9 73.57 0.1406 10.023.50 0.1378 9.62

3,429 0.1350 9.23 103.40 0.134 9,098 103.30 0.1299 8,5533.25 0.128 8,296 10 8

3,175 0.125 7,9173,048 0.120 72,966 11 113.00 0.1181 7,0682.95 0.116 6,835 112.90 0.1144 6.63 92.85 0.1122 6,3792.80 0.1102 6,153

2,769 0.109 6,020 122.70 0.1063 5,7252.68 0.1055 5.64 122.64 0.104 5,474 122.60 0.1024 5.31

2,586 0.1018 5.25 102.55 0.1004 5.102.50 0.0984 4.902.45 0.0965 4.71

2,413 0.095 4,573 132.38 0.0938 4,4582.34 0.092 4,300 13

2,324 0.0915 4,242 132.30 0.0907 4,168 11

2,257 0.08885 4.002.20 0.0866 3.80

2,108 0.083 3,490 142.10 0.0827 3.462.05 0.0807 3,3002.03 0.080 3,237 14 14 122.00 0.0787 314,1591.98 0.0781 3,0901.95 0.0768 2,9861.85 0.0728 2,6881.83 0.072 2,630 15 15 15 13

1,784 0.0702 2.501.70 0.0669 2,269

1,651 0.065 2.14 161.63 0.064 2,086 16 141.60 0.063 2,011

15,875 0.0625 1.98 161.50 0.059 1,767

1,473 0.058 1.70 171,448 0.0570 1,646 151.42 0.056 1,584 171.40 0.055 1,539

1,382 0.0544 1.50 171.30 0.0512 1,327

1,290 0.0508 1.30 1612,446 0.049 12,166 18

1.22 0.048 1,169 1812,065 0.0475 1,143 181,181 0.0465 10,9561,148 0.0452 1,035 171,128 0.0444 1.001.10 0.0433 0.950

1,067 0.042 0.8938 191,041 0.041 0.852 191.02 0.040 0.8171 19 18

1,000 0.0394 0.7870.98 0.0386 0.7540.95 0.0374 0.709

0.9144 0.036 0.6567 20 190.889 0.035 0.6207 20

0.8839 0.0348 0.614 200.850 0.0335 0.5690.813 0.032 0.519 21 210.810 0.0319 0.5156 21 200.79 0.0312 0.4900.75 0.0295 0.442

0.71112 0.028 0.3973 22 22 22 210.660 0.026 0.3425 230.635 0.025 0.3167 23 220.610 0.024 0.2922 230.579 0.0228 0.2634 24

0.5715 0.0225 0.2565 230.5588 0.022 0.2453 24 24

0.52 0.0205 0.212370.508 0.020 0.2027 25 25 25 24

0.4572 0.018 0.16417 26 26 260.45466 0.0179 0.162354 25

0.450 0.0177 0.15900.44168 0.01739 0.1532 25.25

0.439 0.0173 0.152 270.42906 0.01689 0.14458 25.5

0.417 0.0164 0.1366 27 28 25.750.406 0.016 0.1297 27

0.40386 0.0159 0.1281 260.3988 0.0157 0.12490.396 0.0156 0.1232

0.39332 0.01549 0.12150 26.25

0.38209 0.01504 0.11466 26.50.378 0.0149 0.111 29

0.3759 0.0148 0.1109 280.37117 0.01461 0.10820 26.750.36068 0.0142 0.10215 270.3569 0.01405 0.1000 28 30

0.35027 0.01379 0.09636 27.250.345 0.0136 0.0935 29

0.34026 0.01340 0.09093 27.50.330 0.013 0.0856 29 31 27.750.325 0.0128 0.0830 32

0.3200 0.0126 0.0805 280.3150 0.0124 0.07791 30

0.31192 0.01228 0.07641 28.250.3048 0.0120 0.073 30

0.30301 0.01193 0.07211 28.50.2998 0.0118 0.07055 330.295 0.0116 0.06835 31 28.75

0.2870 0.0113 0.064696 290.27777 0.01094 0.060598 29.250.2743 0.0108 0.05910 32

0.26984 0.01062 0.05719 29.50.2641 0.0104 0.05480 34

0.26213 0.01032 0.053966 29.750.254 0.0100 0.05067 33 31 30

0.24736 0.00974 0.04805 30.250.2413 0.0095 0.04573 35

0.24030 0.00946 0.45352 30.50.2337 0.0092 0.04289 34 30.750.2260 0.0089 0.0401 32 36 31

0.22028 0.00867 0.0381 31.250.213 0.0084 0.03563 35 37 31.5

0.20788 0.00818 0.03394 31.750.2032 0.0080 0.03243 320.200 0.0079 0.03162 33 38

0.19617 0.00772 0.03022 32.250.1930 0.0076 0.02927 36 39

0.19056 0.00750 0.02852 32.50.18512 0.00729 0.0269 32.750.1803 0.0071 0.02554 330.1778 0.0070 0.0248 34 40

0.17469 0.00688 0.02397 33.250.173 0.0068 0.0235 37

0.16970 0.00668 0.0226 33.50.1676 0.0066 0.02207 41

0.16485 0.00649 0.02134 33.750.1600 0.0063 0.020 42 34

0.15557 0.00612 0.01900 34.250.1524 0.0060 0.018241 38 43

0.15112 0.00595 0.01794 34.50.1473 0.0058 0.0170 44 34.750.142 0.0056 0.01589 45 35

0.13854 0.00545 0.01507 35.250.13458 0.00530 0.01422 35.5

0.132 0.0052 0.013685 39 460.13074 0.00515 0.013425 35.75

0.127 0.0050 0.0127 35 47 360.1219 0.0048 0.011675 40 48

0.11985 0.00472 0.01128 36.50.1168 0.0046 0.01072 490.1143 0.0045 0.01026 370.112 0.0044 0.00985 41 50

0.10673 0.00420 0.00895 37.50.102 0.0040 0.00817 42 36 38

0.09504 0.00374 0.00709 38.50.091 0.0036 0.00650 43

0.0889 0.0035 0.006207 390.08464 0.00333 0.005626 39.5

0.081 0.0032 0.005153 440.07874 0.0031 0.004869 40

0.071 0.0028 0.003959 45 410.0636 0.0025 0.003167 420.061 0.0024 0.002922 46

0.0564 0.00222 0.0025 430.051 0.0020 0.00204 47 44

0.0447 0.00176 0.00157 450.041 0.0016 0.00132 48

0.039878 0.00157 0.001249 460.03556 0.00140 0.000993 470.0315 0.00124 0.000779 480.030 0.0012 0.000707 490.282 0.00111 0.000624 490.025 0.0010 0.000491 50 500.022 0.00088 0.000392 51

0.0198 0.00078 0.000308 520.0178 0.00070 0.000248 530.0157 0.00062 0.000195 540.014 0.00055 0.000153 55

0.0125 0.00049 0.000122 56

125 Hz160 Hz200 Hz250 Hz325 Hz410 Hz500 Hz650 Hz810 Hz1100 Hz1300 Hz1650 Hz2050 Hz2600 Hz3200 Hz4150 Hz5300 Hz6700 Hz8250 Hz11 k Hz13 k Hz17 kHz21 kHz27 kHz33 kHz42 kHz53 kHz68 kHz85 kHz107 kH130 kHz170 kHz210 kHz270 kHz340 kHz430 kHz440 kHz540 kHz540 kHz690 kHz690 kHz870 kHz900 kHz1100 kHz

Maximum frequency for

100% skin depth for solid conductor copper

1150 kHz1350 kHz1400 kHz1750 kHz1750 kHz2250 kHz2900 kHz

No. or InchLetter FractionDrill Drill

1-Feb

31/6415/32

29/64Jul-16

27/64Z

13/32Y

X

25/64

V 3-Aug

U

23/64T

SNov-32

R

Q

P 21/64O

May-16

N

19/64ML

K Sep-32

JIH 17/64

G

F

E 1-AprD

C

BA 15/64

1

2Jul-32

34

5 or 6*

13/647 or 8*

910 or 11*

11Mar-16

13141516

17Nov-64

1819

20

21 or 22*May-32

23 or 24*25

262728 Sep-6429

30

1-Aug

3132

3334 or 35*

Jul-6436

3738

394041

42 Mar-32

4344

4546

47May-64

4849

5051

52Jan-16

53

54

55

56 Mar-64

575859606162636465

6667

68 Jan-32697071727374

7576

77

78Jan-64

79

80