Metric
Conversion
Electrical Formulas
Conduit Weight
Maximum # of Conductors in Conduit
600 Volt Building Wire Weights & Ampacities
Ampacities of Insulated Conductors
Copper to Aluminum
Receptacle Configuration
Electrical Metric Conversions
Metric Converstions
1
meter = 39.37 inches
1 centimeter = 0.39 inch
1 millimeter = 0.039 inch
1 inch = 0.025 meter
1 inch = 2.564 centimeters
1 inch = 25.641
millimeters
Conduit Inside Diameters
|
Trade
Size
|
Inches
|
Millimeters
|
|
1/2
|
0.622
|
15.8
|
|
3/4
|
0.824
|
20.9
|
|
1
|
1.049
|
26.6
|
|
1
1/4
|
1.380
|
35.0
|
|
1
1/2
|
1.610
|
40.9
|
|
2
|
2.067
|
52.5
|
|
2
1/2
|
2.469
|
62.7
|
|
3
|
3.068
|
77.9
|
|
3
1/2
|
3.548
|
90.1
|
|
4
|
4.026
|
102.3
|
|
5
|
5.047
|
128.2
|
|
6
|
6.065
|
154.1
|
Electrical Conductor Areas
United States
|
Size
(AWG)
|
Cir
Mills (area)
|
Sq
MM (area)
|
|
18
|
1,620
|
0.82
|
|
16
|
2,580
|
1.30
|
|
14
|
4,110
|
2.08
|
|
12
|
6,530
|
3.30
|
|
10
|
10,380
|
5.25
|
|
8
|
16,510
|
8.36
|
|
6
|
26,240
|
13.29
|
|
4
|
41,740
|
21.14
|
|
3
|
52,620
|
26.65
|
|
2
|
66,360
|
33.61
|
|
1
|
83,690
|
42.39
|
|
1/0
|
105,600
|
53.49
|
|
2/0
|
133,100
|
67.42
|
|
3/0
|
167,800
|
85.00
|
|
4/0
|
211,600
|
107.19
|
|
250
|
250,000
|
126.64
|
|
300
|
300,000
|
151.97
|
|
350
|
350,000
|
177.3
|
|
400
|
400,000
|
202.63
|
|
500
|
500,000
|
253.29
|
Closest European Sizes
|
Size
- Sq MM
|
Area
- Cir Mils
|
|
0.75
|
1,480
|
|
1.00
|
1,974
|
|
1.50
|
2,961
|
|
2.50
|
4,935
|
|
4.00
|
7,896
|
|
6.00
|
11,844
|
|
10.0
|
19,740
|
|
16.0
|
31,584
|
|
25.0
|
49,350
|
|
----
|
----
|
|
35.0
|
69,090
|
|
50.0
|
98,700
|
|
----
|
----
|
|
70.0
|
138,180
|
|
95.0
|
187,530
|
|
120.0
|
236,880
|
|
150.0
|
296,100
|
|
----
|
----
|
|
185.0
|
365,190
|
|
240.0
|
473,760
|
back to top