Electrical Conduit Fill Calculator
Calculate the maximum number of wires that can safely fit in a conduit per NEC.
Wire Gauge (AWG)
14 AWG
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
3 AWG
2 AWG
1 AWG
1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG
Insulation Type
THHN/THWN
TW
UF
RHW
Conduit Size (inches)
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
3 1/2"
4"
Number of Wires
Please enter a valid number of wires.
Calculate
Result
How It Works