# Wire Gauge Size Chart

The Wire Gauge Size Chart tool is a helpful resource for determining the appropriate gauge of wire for various electrical applications. Wire gauges are used to measure the diameter of wires, and different gauges have different thicknesses. This tool provides a chart that lists the wire gauge sizes, their corresponding diameters, and the maximum current ratings they can handle.

## AWG chart

AWG # | Diameter (inch) |
Diameter (mm) |
Area (kcmil) |
Area (mm ^{2}) |
---|---|---|---|---|

0000 (4/0) | 0.4600 | 11.6840 | 211.6000 | 107.2193 |

000 (3/0) | 0.4096 | 10.4049 | 167.8064 | 85.0288 |

00 (2/0) | 0.3648 | 9.2658 | 133.0765 | 67.4309 |

0 (1/0) | 0.3249 | 8.2515 | 105.5345 | 53.4751 |

1 | 0.2893 | 7.3481 | 83.6927 | 42.4077 |

2 | 0.2576 | 6.5437 | 66.3713 | 33.6308 |

3 | 0.2294 | 5.8273 | 52.6348 | 26.6705 |

4 | 0.2043 | 5.1894 | 41.7413 | 21.1506 |

5 | 0.1819 | 4.6213 | 33.1024 | 16.7732 |

6 | 0.1620 | 4.1154 | 26.2514 | 13.3018 |

7 | 0.1443 | 3.6649 | 20.8183 | 10.5488 |

8 | 0.1285 | 3.2636 | 16.5097 | 8.3656 |

9 | 0.1144 | 2.9064 | 13.0927 | 6.6342 |

10 | 0.1019 | 2.5882 | 10.3830 | 5.2612 |

11 | 0.0907 | 2.3048 | 8.2341 | 4.1723 |

12 | 0.0808 | 2.0525 | 6.5299 | 3.3088 |

13 | 0.0720 | 1.8278 | 5.1785 | 2.6240 |

14 | 0.0641 | 1.6277 | 4.1067 | 2.0809 |

15 | 0.0571 | 1.4495 | 3.2568 | 1.6502 |

16 | 0.0508 | 1.2908 | 2.5827 | 1.3087 |

17 | 0.0453 | 1.1495 | 2.0482 | 1.0378 |

18 | 0.0403 | 1.0237 | 1.6243 | 0.8230 |

19 | 0.0359 | 0.9116 | 1.2881 | 0.6527 |

20 | 0.0320 | 0.8118 | 1.0215 | 0.5176 |

21 | 0.0285 | 0.7229 | 0.8101 | 0.4105 |

22 | 0.0253 | 0.6438 | 0.6424 | 0.3255 |

23 | 0.0226 | 0.5733 | 0.5095 | 0.2582 |

24 | 0.0201 | 0.5106 | 0.4040 | 0.2047 |

25 | 0.0179 | 0.4547 | 0.3204 | 0.1624 |

26 | 0.0159 | 0.4049 | 0.2541 | 0.1288 |

27 | 0.0142 | 0.3606 | 0.2015 | 0.1021 |

28 | 0.0126 | 0.3211 | 0.1598 | 0.0810 |

29 | 0.0113 | 0.2859 | 0.1267 | 0.0642 |

30 | 0.0100 | 0.2546 | 0.1005 | 0.0509 |

31 | 0.0089 | 0.2268 | 0.0797 | 0.0404 |

32 | 0.0080 | 0.2019 | 0.0632 | 0.0320 |

33 | 0.0071 | 0.1798 | 0.0501 | 0.0254 |

34 | 0.0063 | 0.1601 | 0.0398 | 0.0201 |

35 | 0.0056 | 0.1426 | 0.0315 | 0.0160 |

36 | 0.0050 | 0.1270 | 0.0250 | 0.0127 |

37 | 0.0045 | 0.1131 | 0.0198 | 0.0100 |

38 | 0.0040 | 0.1007 | 0.0157 | 0.0080 |

39 | 0.0035 | 0.0897 | 0.0125 | 0.0063 |

40 | 0.0031 | 0.0799 | 0.0099 | 0.0050 |

### Wire diameter calculations

The n gauge wire diameter d_{n} in inches (in) is equal to 0.005in times 92 raised to the power of 36 minus gauge number n, divided by 39:

*d _{n}*

_{ (in)}= 0.005 in × 92

^{(36-n)/39}

The n gauge wire diameter d_{n} in millimeters (mm) is equal to 0.127mm times 92 raised to the power of 36 minus gauge number n, divided by 39:

*d _{n}*

_{ (mm)}= 0.127 mm × 92

^{(36-n)/39}

### Wire cross sectional area calculations

The n gauge wire's cross sercional area A_{n} in kilo-circular mils (kcmil)
is equal to 1000 times the square wire diameter d in inches (in):

*A _{n}*

_{ (kcmil)}= 1000×

*d*

_{n}

^{2}= 0.025 in

^{2}× 92

^{(36-n)/19.5}

The n gauge wire's cross sercional area A_{n} in square inches (in^{2})
is equal to pi divided by 4 times the square wire diameter d in inches (in):

*A _{n}*

_{ (in}2

_{)}= (π/4)×

*d*

_{n}

^{2}= 0.000019635 in

^{2}× 92

^{(36-n)/19.5}

The n gauge wire's cross sercional area A_{n}
in square millimeters (mm^{2})
is equal to pi divided by 4 times the square wire diameter d in millimeters (mm):

*A _{n}*

_{ (mm}2

_{)}= (π/4)×

*d*

_{n}

^{2}= 0.012668 mm

^{2}× 92

^{(36-n)/19.5}

### Wire resistance calculations

The n gauge wire resistance R in ohms per kilofeet (Ω/kft) is equal to 0.3048×1000000000 times the wire's resistivity *ρ* in
ohm-meters (Ω·m) divided by 25.4^{2} times the cross sectional area *A _{n}* in square inches (in

^{2}):

*R*_{n (Ω/kft)} = 0.3048 × 10^{9} × *ρ*_{(Ω·m)} / (25.4^{2}
× *A _{n}*

_{ (in}2

_{)})

The n gauge wire resistance R in ohms per kilometer (Ω/km) is equal to 1000000000 times the wire's resistivity *ρ* in
ohm-meters (Ω·m) divided by the cross sectional area *A _{n}* in square millimeters (mm

^{2}):

*R*_{n (Ω/km)} = 10^{9}
× *ρ*_{(Ω·m)} / *A _{n}*

_{ (mm}2

_{)}