AWG# Wire Table
  Please note that data is approximate, as insulation
  thickness varies between manufacturers.

AWG
#

TPC
[turns/cm]

TPI
[turns/in]

Wire diam
[mm]

18

9.2

23.37

1.024

19

10.2

25.91

0.9116

20

11.6

29.46

0.8118

21

12.8

35.51

0.7230

22

14.4

36.58

0.6438

23

16.0

40.64

0.5733

24

18.0

45.72

0.5106

25

20.0

50.8

0.4547

26

22.8

57.91

0.4049

27

25.6

65.02

0.3606

28

28.4

72.14

0.3211

29

32.4

82.30

0.2859

30

35.6

90.42

0.2546

32

44.5

113.03

0.2019

34

56.0

142.24

0.1601

36

69.0

175.26

0.1270

38

82.3

209.04

0.1007

40

111.0

281.94

0.0799