Conduit Property Table EMT Pipe (English US)

Trade Size

Interior Diameter

Exterior Diameter

Interior Area

Exterior Area

Interior Volume per 

Exterior Volume per 

1/2"

0.62 in

0.71 in

0.30 in2

0.39 in2

36.46 in3

46.98 in3

3/4"

0.82 in

0.92 in

0.53 in2

0.67 in2

63.99 in3

80.12 in3

1"

1.04 in

1.16 in

0.85 in2

1.06 in2

101.94 in3

127.48 in3

1 1/4"

1.38 in

1.51 in

1.50 in2

1.79 in2

179.49 in3

214.89 in3

1 1/2"

1.61 in

1.74 in

2.04 in2

2.38 in2

244.30 in3

285.34 in3

2"

2.07 in

2.20 in

3.36 in2

3.79 in2

402.67 in3

454.92 in3

2 1/2"

2.73 in

2.88 in

5.86 in2

6.49 in2

702.93 in3

779.02 in3

3"

3.36 in

3.50 in

8.85 in2

9.62 in2

1,061.49 in3

1,154.54 in3

3 1/2"

3.83 in

4.00 in

11.55 in2

12.57 in2

1,385.40 in3

1,507.96 in3

4"

4.33 in

4.50 in

14.75 in2

15.90 in2

1,770.31 in3

1,908.52 in3

Conduit Property Table EMT Pipe (Metric)

Trade Size

Interior Diameter

Exterior Diameter

Interior Area

Exterior Area

Interior Volume per 

Exterior Volume per 

16 mm

16 mm

18 mm

196 mm2

253 mm2

2 cm3

2.5 cm3

21 mm

21 mm

23 mm

344 mm2

431 mm2

3 cm3

4.3 cm3

27 mm

26 mm

30 mm

548 mm2

685 mm2

5 cm3

6.9 cm3

35 mm

35 mm

38 mm

965 mm2

1,155 mm2

10 cm3

11.6 cm3

41 mm

41 mm

44 mm

1,313 mm2

1,534 mm2

13 cm3

15.3 cm3

53 mm

53 mm

56 mm

2,165 mm2

2,446 mm2

22 cm3

24.5 cm3

63 mm

69 mm

73 mm

3,779 mm2

4,188 mm2

38 cm3

41.9 cm3

78 mm

85 mm

89 mm

5,707 mm2

6,207 mm2

57 cm3

62.1 cm3

91 mm

97 mm

102 mm

7,448 mm2

8,107 mm2

74 cm3

81.1 cm3

103 mm

110 mm

114 mm

9,518 mm2

10,261 mm2

95 cm3

102.6 cm3

Maximum Number of Wires in Conduit EMT Pipe

THHN Size

1/2"

3/4"

1"

1 1/4"

1 1/2"

2"

2 1/2"

3"

3 1/2"

4"

#14 (2.0 mm²)

12

22

35

61

84

138

242

365

477

609

#12 (3.5 mm²)

9

16

25

45

61

101

176

266

347

444

#10 (5.5 mm²)

5

10

16

28

38

63

110

167

218

279

#8 (8.0 mm²)

3

5

9

16

22

36

63

96

126

161

#6 (14 mm²)

1

4

6

11

16

26

46

69

91

116

#4 (22 mm²)

1

2

4

7

9

16

28

42

56

71

#3

1

1

3

6

8

13

24

36

47

60

#2 (30 mm²)

1

1

2

5

7

11

20

30

39

50

#1 (38 mm²)

1

1

1

3

5

8

14

22

29

37

#1/0 (50 mm²)

0

1

1

3

4

7

12

19

24

31

#2/0 (60 mm²)

0

1

1

2

3

6

10

15

20

26

#3/0 (80 mm²)

0

1

1

1

3

5

8

13

17

22

#4/0 (100 mm²)

0

0

1

1

1

4

7

10

14

18

#250 (125 mm²)

0

0

1

1

1

3

5

8

11

14

#300 (150 mm²)

0

0

0

1

1

2

5

7

10

12

#350 (175 mm²)

0

0

0

1

1

1

4

6

8

11

#400 (200 mm²)

0

0

0

1

1

1

3

6

7

10

#500 (250 mm²)

0

0

0

1

1

1

3

5

6

8

#600 (300 mm²)

0

0

0

0

1

1

2

4

5

6

#700 (325 mm²)

0

0

0

0

1

1

1

3

4

5

#750 (380 mm²)

0

0

0

0

1

1

1

3

4

5

#800 (400 mm²)

0

0

0

0

0

1

1

3

4

5

#900

0

0

0

0

0

1

1

2

3

4

#1000 (500 mm²)

0

0

0

0

0