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VoltKit

The electrician's calculator toolkit — fully offline.

Built for the field

NEC-grounded calculators that work with no signal — in a basement, an attic, or a new-construction site. No account, no cloud, no tracking.

  • Voltage Drop & minimum wire size
  • Wire Size / Ampacity (NEC 310.16)
  • Conduit Fill (Chapter 9)
  • Box Fill (NEC 314.16)
  • Ohm's Law & Power Wheel
  • Conduit Bending (offset, stub, saddle)

VoltKit Pro

All calculators are free. VoltKit Pro (one-time purchase, no subscription) unlocks unlimited saved jobs and PDF / share export for clients and inspectors.