WattwiseElectrician Calculator
Cable size, voltage drop, breakers, motors and solar: 22 offline electrical calculators.
GET IT ONGoogle Play- Android 8.0+
- 7 languages
- Works offline
- No account

Wattwise is the electrical calculator for electricians, engineers, installers and serious DIYers. 22 calculators and a reference library, all offline, with IEC and NEC sizes.
What you get
- Cable size, voltage drop, breaker size and AWG ⇄ mm²
- Ohm's law, kW · kVA · amps, energy cost and unit converter
- Pro: motor current, power factor, transformer and generator size
- Pro: solar PV system and battery runtime
- Resistor colour code, LED resistor, series and parallel
- Metric and imperial, 6 colour themes, no ads
Screenshots




Price
Free. Wattwise Pro is a one-time in-app purchase (USD 4.99) with no subscription.
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