Free calculator

Rough-In Component Index

Count device boxes, THHN wire, and wire-nut boxes needed for an electrical rough-in.

Results

Enter your dimensions and hit Calculate.

Have your electrician verify device counts against the project plans.

Assumptions

  • Wire-nuts: 4 per receptacle box, 3 per switch box, 6 per home run.
  • THHN: 75 ft per home run (average panel-to-load distance).
  • Wire-nut boxes ceiling-rounded to nearest 100-ct box.

Free download

Land Planning Master Checklist

The complete checklist for planning your property — from raw land to build-ready site. Clearing, access, drainage, septic, utilities, permits, foundation, and everything in between.

  • ✓Every stage in the right sequence
  • ✓What to verify before each phase starts
  • ✓Questions to ask your contractor
  • ✓Common mistakes and how to avoid them

Free account — includes the checklist + 3 saved calculations.

Create your free account to get the checklist.

Already have an account? Log in to access your downloads.