Open the More menu and tap Field Tools (on the web app, it's in the left sidebar). Switch between the Calculators and NEC Tables tabs. Everything here is free for every user on every plan — no paywall, no limits — and works offline in the iOS and Android apps.
Installation
Box fill, pull box sizing, conduit fill, conduit bending, cable tray fill, wire pulling tension, torque specs, underground depth, overhead clearance, working space, support spacing, receptacle spacing, lighting, and phase colors.
Power calculations
Voltage drop, Ohm's Law, reactance, power factor, power triangle, three-phase, and short circuit / fault current.
Sizing & rating
Ampacity, residential and commercial load calculations, service entrance, grounding & bonding, and neutral sizing.
Equipment
Motors (NEC Article 430), transformers, solar PV, and EV charging.
Unit conversion
Convert between common electrical and measurement units on the fly.
NEC tables
Look up 25 NEC tables — working space, overcurrent device ratings, grounding conductors, ampacity, box fill, motor FLC and protection, transformer OCP, Chapter 9 conduit and conductor tables, and Annex C fill tables.
Field reference
Conduit bending reference, imperial and metric tap drill charts, and hole saw sizes.