ETCO has developed a guide to conversions and formulas to help you address problem points and questions. Reference the guide to see relevant conversions as well as formulas.

Conversions & Formulas

When you know Mass:

MassYou can find:If you multiply by:
ouncesgrams28
poundskilograms0.45
short tonsmegagrams (metric tons)0.9
gramsounces0.035
kilogramspounds2.2
megagrams (metric tons)short tons1.1

Fraction Conversions

Fractions to Decimals and Millimeters

InchDecimal InchMillimeter
1/640.0156250.396785
1/320.031250.79375
3/640.0468751.190625
1/160.06251.5875
5/640.0781251.984375
3/320.093752.38125
7/640.1093752.778125
1/80.1253.175
9/640.1406253.571875
5/320.156253.96875
11/640.1718754.365625
3/160.18754.7625
13/640.2031255.159375
7/320.218755.55625
15/640.2343755.953125
1/40.256.35001
17/640.2656256.746875
9/320.281527.14375
19/640.2968757.540625
5/160.31257.9375
21/640.3281258.334375
11/320.343758.73125
23/640.3593759.128125
3/80.3759.525
25/640.3906259.921875
13/320.4062510.31875
27/640.42187510.715625
7/ 160.437511.1125
29/640.45312511.509375
15/320.4687511.90625
31/640.48437512.303125
1 /20.5012.7
33/640.51562513.096875
17/320.5312513.49375
35/640.54687513.890625
9/160.562514.2875
37/640.57812514.684375
19/320.5937515.08125
39/640.60937515.478125
5/80.62515.875
41 /640.64062516.271875
21/320.6562516.66875
43/640.67187517.065625
11/160.687517.4625
45/640.70312517.859375
23/320.7187518.25625
47/640.73437518.653125
3/40.7519.05
49/640.76552519.446875
25/320.7812519.84375
51/640.79687520.240625
13/160.812520.6375
53/640.82812521.034375
27/320.8437521.43125
55/640.85937521.828125
7/80.87522.225
57/640.89062522.621875
29/320.9062523.01875
591640.92187523.415625
15/160.937523.8125
61/640.95312524.209375
31/320.9687524.60625
63/640.98437525.003125
11.0000025.4

Wire Sizes #28 to #8 AWG (0.080 To 8.5 MM2)

Wire Strand Table and Comparison

AWG #28 – #18

28-18

WireStrandsCMATotal
Size
AWGNumberDiameterDiameter
#2610.01592540.016
#2680.00562520.018
#26100.0052500.018
#2510.01793200.018
#25100.00563150.02
#2580.00633180.021
#2410.02014040.02
#2480.00713980.023
#24100.00633980.023
#2470.0084480.024
#2310.02265100.023
#23100.00715010.026
#2380.0085060.026
#2210.02536420.025
#22210.0055250.025
#226.0lD6000.028
#2280.00896320.029
#22100.0086380.029
#227.0lD7000.03
#22160.00636360.029
#2010.03210240.032
#20190.0079500.036
#2070.01210250.036
#20260.006310350.039
#20100.0110050.04
#2070.012611200.04
#1810.0416000.04
#18190.009216070.046
#1870.015316390.046
#18650.00516250.048
#18160.0116160.049
#18410.006316400.049
#1870.015217790.05

16-8

WireStrandsCMA
Size
AWGNumberDiameter
#1610.05082583
#1670.01922580
#16190.01172601
#16650.00632587
#161050.0052625
#16190.01172409
#16260.012625
#1410.0644107
#14370.01054081
#1470.02424099
#141050.00634179
#14190.01474106

Wire Sizes

Wire Sizes in AWG and MM2 to CMA

AWG 28-17

CMANominal Wire SizeStrands DiameterApproximate Conductor Diameter
AWGmm2No.InchmmInchmm
159280.0810.01260.320.0130.32
175280.0970.0050.1270.0150.38
181.5280.09190.00310.0790.0160.4
198270.1510.0020.050.0160.42
202270.110.01420.3610.0140.36
238260.1260.00630.160.0180.46
250260.13100.0050.1270.0180.46
250260.13260.00310.0790.0180.46
251260.1380.00560.1420.0180.46
253260.1310.01590.4040.0160.4
256260.13160.0040.10.0180.46
278260.1470.00630.160.0190.48
279260.14720.0020.050.0220.56
279260.14180.00390.1020.0220.56
300260.1530.010.2540.020.51
304260.15190.0040.10.020.51
314250.1610.01770.450.0180.45
314250.16100.00560.1420.020.51
318250.1680.00630.160.0210.53
320250.1610.01790.4550.0180.46
388240.210.01970.50.020.5
395240.21020.0020.050.020.51
397240.2100.00630.160.0230.58
400240.2160.0050.1270.0230.58
400140.240.010.2540.0230.58
403240.280.00710.180.0230.58
404240.210.02010.510.020.51
408240.2130.00560.1420.0230.58
475240.2190.0050.1270.0230.58
634220.380.00890.2260.0290.74
635220.3160.00630.160.0290.74
640223100.0080.2030.0290.74
640220.310.02530.6430.0250.64
650220.3260.0050.1270.0330.84
700220.470.010.2540.030.76
754220.4190.00630.160.0330.84
812210.410.02850.7240.0290.72
992200.510.03150.810.0320.8
992200.5160.0080.2030.0391
992200.52560.0020.050.0391
1003200.5200.00710.180.0391
1000200.5100.010.2540.0380.97
1020200.510.0320.8130.0320.81
1025200.5410.0050.1270.0380.97
1032200.5260.00630.160.0390.99
1111200.670.01260.320.0390.99
1186200.6190.00790.2010.0411.04
1289190.610.03590.9120.0360.91
148518 1/20.7570.01460.370.0471.2
148818 1/20.75240.0080.20.0471.2
148818 1/20.753840.0020.050.0471.2
150418 1/20.75300.00710.180.0471.2
1600180.8160.010.2540.0491.24
1608180.8190.00920.2340.0491.24
1617180.870.01520.3860.0421.07
1614180.810.04031.0240.041.02
1625180.8650.0050.1270.041.02
1627180.8410.00630.160.0491.24
1639180.870.01530.3890.0421.06
1792180.970.01590.4040.0481.22
1900181190.010.2540.0521.32
197217110.04451.130.0451.13
1984171320.0080.2030.0471.2
19841715120.0020.050.0491.25
200417170.01690.430.0471.2
205217110.04531.1510.0451.15
2426161.2190.01130.2870.0611.55
2510161.25500.00710.180.059l.50
2537161.25160.01260.320.0591.5

AWG 16-8

CMANominal Wire SizeStrands DiameterApproximate Conductor Diameter
AWGmm2No.InchmmInchmm
2580161.3650.00630.160.059l.50
2581161.310.05081.290.0511.29
2600161.3260.010.2540.061l.55
2625161.31050.0050.1270.0591.5
2800161.470.020.5080.0611.55
290615 1/21.5300.010.2540.0591.5
293415 1/2l.570.02050.520.0591.5
295215 1/21.510.05431.380.0541.38
297415 1/21.53920.00280.070.0611.55
3260151.610.05711.450.0571.45
3831142190.01420.360.0761.93
390214270.02360.60.0711.8
4079142370.01050.2660.0731.85
409914270.02420.6140.0761.93
410014241.Qloo0.2540.0771.96
4106142190.01470.3730.0761.93
410914210.06411.6280.0641.63
4123142260.01260.320.0751.9
41671421050.00630.160.0731.85
4234142840.00710.180.0741.85
484413 1/22.5500.00980.25872.2
487113 1/22.570.02630.670.0792.01
493513 1/22.5I0.07011.780.071.78
5184132610.0721.830.0721.83
6088123190.01790.450.0962.44
64751232590.0050.130.1052.67
6500123650.010.250.0962.44
6501123410.01260.320.0942.4
6503123190.01850.470.0922.34
651212370.03050.770.0862.18
652912310.08082.050.0812.05
6545123370.01330.340.0932.36
65491231650.0062160.0952.41
6654123840.00890.230.0942.4
693911 1/23.570.03150.80.0942.4
781211 1/24560.00120.030.1022.6
783911 1/2470.03350.850.12.55
789611 1/2410.10042.550.12.55
796311 1/24190.02050.520.1012.57
822711410.09072.30.0912.3
907210570.0360.910.0962.44
9472105370.0160.410.1092.77
10309105650.01260.320.1183
10319105370.01670.420.1092.77
10365105410.01590.40.1223.1
1037010570.03850.980.0962.44
1038410510.10192.590.1022.59
10404105190.02340.590.1172.97
10500105.51050.010.250.1162.95
10842105570.039410.1183
11718106840.01180.30.133.3
1173510670.04091.040.1283.25
1184410610.10872.760.1092.76
12063106190.02520.640.1263.2
1294396.570.0431.090.133.3
1308796.510.11442.910.1142.9
13125975250.0050.130.143.56
141758770.0451.140.1463.71
1510587.5190.02750.70.1453.68
156128870.04721.20.1423.6
1568188500.01770.450.1463.7
1638788130.01110.280.1674.211
164348870.04861.230.1463.71
1647388370.02110.540.153.81
165128810.12853.260.1293.26
1653588190.02950.750.1483.76
1658988490.01840.470.153.81
169838851330.01130.290.1674.24

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