How To Compute Circular Mil Area Of (Cma) Of Various Shapes Of Wire

Wire Sizes

HOW TO COMPUTE CIRCULAR MIL AREA OF (CMA)
OF VARIOUS SHAPES OF WIRE

Dia.

Round Solid Wire AWG

x

Dia.

Multiply the diameter in Mils by itself. CMA = D2

D x D = CMA
DMultiply the diameter of one strand
(in mils) by itself, and then multiply the
result by the total number of strands.

Stranded Wire AWG
D

D x D x Number
of Strands = CMA

WIRE SIZESSTRANDS

STRANDS
WIRE
SIZE
AWG.

NUMBER

DIA.

AREA
CIRC.
MILLS

#26
#26
#26

1
8
10

.0159
.0056
.005

254
252
250

.016
.018
.018

#25
#25
#25

1
10
8

.0179.0056
.0063

320
315
318

.018
.020
.021

#24
#24
#24
#24

1
8
10
7

.0201
.0071
.0063
.008

404
398
398
448

.020
.023
.023
.024

#23
#23
#23

1
10
8.0226
.0071
.008

510
501
506

.023
.026
.026

#22
#22
#22
#22
#22
#22
#22

1
21
6
8
10
7
16

.0253
.005
.010
.0089
.008
.010
.0063

642
525
600
632
638
700
636.025
.025

#20
#20
#20

1
19
7

.032
.007
.012

1,024
950
1,025

.032
.036
.036

58

TOTAL
DIA.

.029
.029
.030
.029

WIRE
SIZE
AWG.

STRANDS

NUMBER

DIA.AREA
CIRC.
MILLS

#20
#20
#20

26
10
7

.0063
.010
.0126

1,035
1,005
1,120

.039
.040
.040

#18
#18
#18
#18
#18
#18
#18

1
19
7
65
16
41
7

.040
.0092.0153
.005
.010
.0063
.0152

1,600
1,607
1,639
1,625
1,616
1,640
1,779

.040
.046
.046
.048
.049
.049
.050

#16
#16
#16
#16
#16
#16
#16

1
7
19
65
105
19
26

.0508.0192
.0117
.0063
.005
.0117
.010

2,583
2,580
2,601
2,587
2,625
2,409
2,625

.051
.058
.058
.059
.059
.061
.061

#14
#14
#14
#14
#14
#14

1
37
7
105
19
84

.064.0105
.0242
.0063
.0147
.0071

4,107
4,081
4,099
4,179
4,106
4,208

.064
.073
.073
.073
.074
.074

TOTAL
DIA.

DIA.

AREA
CIRC.
MILLS

TOTAL
DIA.

.025
.010...