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AWG (American Wire Gauge) to Metric Conversion Chart

AWG (American Wire Gauge) is used predominantly in North America for wire outside diameter and cross-section. Dimensions are defined by the ASTM B258 standard. AWG sizes with multiple zeros can be designated as number of zeros or number of zeros/0. Both metric wire cross-section and wire outside diameter can be calculated by formulas using just the AWG number. The formula for the wire outside diameter is: 0.127 mm * 92(32-n)/39 [mm]. The formula for metric wire cross-section is: 0.012668 mm2 * 92(36-n)/19.5 [mm2]. In both formulas, n is the AWG number.

AWG to metric conversion chart

AWG number

Wire outside diameter [inch]

Wire outside diameter [mm]

Wire cross-section [mm2]

0000 (4/0)

0.460

11.684

107.160

000 (3/0)

0.410

10.405

84.970

00 (2/0)

0.365

9.266

67.400

0 (1/0)

0.325

8.251

53.460

1

0.289

7.348

42.409

2

0.258

6.544

33.632

3

0.229

5.827

26.671

4

0.204

5.189

21.151

5

0.182

4.621

16.774

6

0.162

4.115

13.302

7

0.144

3.665

10.549

8

0.128

3.264

8.366

9

0.114

2.906

6.634

10

0.102

2.588

5.261

11

0.0907

2.305

4.172

12

0.0808

2.053

3.309

13

0.0720

1.828

2.624

14

0.0641

1.628

2.081

15

0.0571

1.450

1.650

16

0.0508

1.291

1.309

17

0.0453

1.150

1.038

18

0.0403

1.024

0.823

19

0.0359

0.912

0.653

20

0.0320

0.812

0.518

21

0.0285

0.723

0.411

22

0.0253

0.644

0.326

23

0.0226

0.573

0.258

24

0.021

0.511

0.205

25

0.0179

0.455

0.162

26

0.0159

0.405

0.129

27

0.0142

0.361

0.102

28

0.0126

0.321

0.081

29

0.0113

0.286

0.064

30

0.010

0.255

0.051

31

0.00893

0.227

0.040

32

0.00795

0.202

0.032

33

0.00708

0.180

0.025

34

0.00631

0.160

0.020

35

0.00562

0.143

0.016

36

0.005

0.127

0.013

37

0.00445

0.113

0.010

38

0.00397

0.101

0.008

39

0.00353

0.090

0.006

40

0.00314

0.080

0.005