Empowering a brighter world through superior education is our commitment.

Online Calculators & Tools

SWG to mm conversion

Standard wire gauge (SWG) to mm and mm2 converison calculator, chart and how to convert.

Select gauge #:
 
Diameter in millimeters:mm
Diameter in inches:in
Cross sectional area in square millimeters:mm2

Wire cross sectional area calculation

The n gauge wire's cross sercional area Anin square millimeters (mm2) is equal to pi divided by 4 times the square wire diameter d in millimeters (mm):

An (mm2) = (π/4)×dn2

SWG to mm conversion chart

SWG #Diameter
(mm)
Area
(mm2)
7/012.700126.6769
6/011.786109.0921
5/010.97394.5638
4/010.16081.0732
3/09.44970.1202
2/08.83961.3643
08.23053.1921
17.62045.6037
27.01038.5989
36.40132.1780
45.89327.2730
55.38522.7735
64.87718.6793
74.47015.6958
84.06412.9717
93.65810.5071
103.2518.3019
112.9466.8183
122.6425.4805
132.3374.2888
142.0323.2429
151.8292.6268
161.6262.0755
171.4221.5890
181.2191.1675
191.0160.8107
200.9140.6567
210.8130.5189
220.7110.3973
230.6100.2919
240.5590.2452
250.50800.2027
260.45720.1642
270.41660.1363
280.37590.1110
290.34540.0937
300.31500.0779
310.29460.0682
320.27430.0591
330.25400.0507
340.23370.0429
350.21340.0358
360.19300.0293
370.17270.0234
380.15240.0182
390.13210.0137
400.12190.0117
410.11180.0098
420.10160.0081
430.09140.0066
440.08130.0052
450.07110.0040
460.06100.0029
470.05080.0020
480.04060.0013
490.03050.0007
500.02540.0005