Codewire: Electrician Calc

Codewire is the fast, offline calculator set built for electricians and apprentices. No ads, no signup, no subscription. Every calculator runs on your phone, even with no signal.

WHAT'S INSIDE
- Voltage Drop. Single- or three-phase, copper or aluminum, with drop %, voltage at the load, and the smallest wire that holds your target.
- Wire Ampacity. Adjusted for ambient heat and bundled conductors.
- Conduit Fill. EMT, rigid, and PVC, with the 53 / 31 / 40% limits applied.
- Conduit Bending. Offset, rolling offset, three- and four-bend saddle, 90 degree stub, and back-to-back, with per-size take-up.
- Box Fill. Required volume from conductors, devices, clamps, and grounds.
- Ohm's Law. Solve any two of V, I, R, and P.
- Three-Phase Power and kVA to Amps.
- Motor Full-Load Current by horsepower.
- Unit Converter. AWG to mm2, kW to HP, F to C, ft to m, and more.

THE BEND ANGLE LEVEL
Turn your phone into a digital angle finder. Lay it on the conduit and read the bend angle live, hands-free, with a set-zero reference. Most apps charge for this. Codewire includes it free.

SHOWS ITS WORK
Every result has a tap-to-reveal with the formula and method behind it, so apprentices learn the why, not just the number.

BUILT RIGHT
- Works 100% offline.
- No ads, ever.
- No account, no tracking. Saved calculations stay on your device.
- Clean, fast input designed for the field.

FREE, NO ACCOUNT NEEDED
- Voltage drop, wire ampacity, Ohm’s law, and conduit fill.

CODEWIRE PRO (one-time in-app purchase)
A single purchase unlocks the advanced tools: three-phase power, kVA to amps, motor FLC, conduit bending, box fill, the bend-angle level, saved calculations, and the full NEC reference tables. No subscription.

Codewire is a reference tool. Always verify results against the code edition adopted by your jurisdiction and your AHJ. It is not a substitute for a licensed electrician.

Recent changes:
Codewire is now on Android. NEC 2023 conduit fill, voltage drop, box fill, ampacity and OCPD sizing, worked out step by step so you can check the reasoning rather than trust a number.