Conduit fill calculator brought to you by Electrical Training Source where content is created by electricians for electricians.

The ETS Conduit Fill Calculator will easily help you figure out what size minimum emt you need to install depending on the size and number of wires you are pulling in.

Current Version includes:

-EMT conduit sizes from 1/2" to 3"
-THNN wire type; size ranging from 14 AWG to 4/0

Future versions in the works will expand both wire and conduit types.

Wire fill is based on the 2017 National Electrical Code at 40% fill capacity.