Every electrician’s
essential toolkit.
NEC calculations, wire sizing, conduit fill, voltage drop & more — all offline, all instant.
Every calc you need on the job
Voltage drop
Instant NEC-compliant calculations for any circuit. Works with copper and aluminum conductors.
Wire sizing
AWG ampacity tables, temperature correction factors, and derating all in one place.
Conduit fill
NEC Article 358 fill percentage for any conduit type and wire combination, instantly.
NEC reference
Quick-access code tables and articles. No more flipping through a paper codebook on site.
Ohm’s law
Full power triangle — solve for voltage, current, resistance, or power from any two known values.
Unit converter
Electrical and dimensional units — imperial to metric and back. Save your most-used conversions.
Works fully offline. No signal in the basement, metal building, or underground? No problem. All calculators and NEC tables work without internet — always.
Pay once. Use forever.
- All calculators unlocked
- Full NEC reference tables
- Offline access, always
- Save favorites & calculation history
- Free updates for 12 months
- No subscriptions. Ever.
Start your 30-day trial instantly. No payment information needed until you decide to keep it.
Built for the trade
“Worth every penny. Used the voltage drop calc on every rough-in last week. Saved me from pulling wrong wire gauge twice.”
“Finally an app that works without signal. Basement jobs, metal buildings — I don’t have to worry about data anymore.”
“Conduit fill calculator alone is worth the price. I used to carry a printed chart everywhere — threw it out after day one.”
