Voltix Electrical Calculators

Voltix is a professional electrical calculator app built for electricians, electrical engineers and apprentices working to BS 7671, NEC or AS/NZS 3000.

Stop flicking through tables and doing mental arithmetic on site. Enter your values, get your answer.

Calculators included:

Wire Sizing — find the correct cable size with derating applied

Voltage Drop — check compliance against the 3% / 5% limit

Cable Derating — apply correction factors for temperature and grouping

Breaker Sizing — select the right protective device rating

Load Calculation — calculate total demand for a dwelling or installation

Conduit Fill — check conductor fill against code limits

Box Fill — verify enclosure capacity

Grounding / Earthing Conductor Sizing

Earth Fault Loop Impedance (Zs check and R1+R2)

Ohm's Law — solve for V, I, R or P from any two known values

Reference tables (Pro)

Full BS 7671, NEC and AS/NZS 3000 reference tables — cable ratings, correction factors, maximum Zs values and more. Available offline, no signal required.

Three standards, one app

Switch between United Kingdom (BS 7671 18th Edition), United States (NEC) and Australia & New Zealand (AS/NZS 3000) in Settings. The correct tables and limits load automatically.

Built for real work

Works offline — no internet needed on site

Dark mode, easy to read in all lighting conditions

Fast inputs, instant results