Free calculator

Wire & Spool Sizer

Estimate total wire footage and spool count for a branch-circuit rough-in.

Results

Enter your dimensions and hit Calculate.

Wire sizing (gauge, breaker ampacity, conduit fill) must be done by a licensed electrician per NEC. This is a quantity estimator only.

Assumptions

  • 10 ft added per circuit for panel connections and terminations.
  • 5% overage for routing and waste.
  • Standard spool: 250 ft. Adjust spool count if using other spool sizes.

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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.

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