Electrical Calculations is the best app in the electrical sector, it has many calculations that can help you in your work. It can not miss in your smartphone!

Main calculations:
Wire size, Calculation of voltage drop, Calculation of current, Calculation of voltage, Calculation of active power, Calculation of apparent power, Calculation of reactive power, Calculation of power factor, Calculation of resistance, Calculation of impedance, Maximum wire length, Current carrying capacity of insulated conductors [PRO], Current carrying capacity of bare conductors [PRO], Current carrying capacity of busbar [PRO], Conduit fill [PRO], Sizing the circuit breaker [PRO], Admissible let-through energy of the cable (K²S²) [PRO], Operating current, Reactance [PRO], Impedance from resistance and reactance [PRO], Power factor correction [PRO], Power factor correction of transformer MV/LV [PRO], Capacitor power at different voltage [PRO], Earthing system, Maximum short-circuit current [PRO], Minimum short-circuit current, Maximum short-circuit current with transformer substation [PRO], Conductor resistance, Calculation of the cable temperature [PRO], Power losses in cables [PRO], Resistor color code, Inductor color code, Resistor colors from value, SMD resistor code, Capacitor code, Inductor alphanumeric code, Fuses, Sum resistors, Sum capacitors, Resonant frequency [PRO], Voltage divider [PRO], Current divider [PRO], Zener diode as voltage stabiliser [PRO], Resistance to reduce voltage, Resistance for led, Battery life, Primary/Secondary winding of transformer, Antenna length, CCTV Harddrive/Bandwidth calculator, Temperature sensors (PT/NI/CU, NTC, Thermocouples…) [PRO], Analog signal values [PRO], Joule effect, Risk assessment of overvoltages with atmospheric origin [PRO], Fault current of strings [PRO].

Motor:
Motor current, Motor power, Motor voltage, Motor power factor, Motor efficiency, Motor from three-phase to single-phase, Capacitor start motor single-phase, Motor speed [PRO], Motor slip [PRO], Power / Maximum torque [PRO], Motor full-load current [PRO], Diagrams of the three-phase motor (6 leads), Diagrams of the three-phase motor (9 leads), Diagrams of the three-phase motor (12 leads), Motor connections, Motor terminals marking, Insulation class of the motor.

Conversions:
Δ-Y conversion [PRO], Power conversion, AWG conversion table, SWG conversion table, Imperial / metric conductor size comparison, Section conversion, Length conversion, Voltage (Amplitude) conversion, sin/cos/tan/φ conversion [PRO], Energy conversion, Temperature conversion, Pressure conversion, Ah - kWh conversion, VAr / µF conversion [PRO], Gauss - Tesla conversion, RPM - rad/s - m/s conversion, Frequency / Angular speed conversion, Torque conversion, Byte conversion, Angle conversion.

Resources:
Fuses application categories, UL/CSA fuse class, Standard resistor values, Tripping curves, Table of cables reactance [PRO], Table of resistivity and conductivity, Table of unitary voltage drop, Dimensions and weight of cables, IP/IK/NEMA protection classes, Atex marking [PRO], Appliance classes, CCTV resolutions, Thermocouple colour codes and data, ANSI standard device numbers [PRO], Electrical symbols, Electricity around the world, Plug and socket types, IEC 60320 connectors, C-Form Sockets (IEC 60309), Nema connectors, EV charging plugs, Wiring color codes, SI Prefixes, Units of measurement, Pipes dimensions.

Pinout:
Ethernet wiring (RJ-45), Pinout Ethernet with PoE, RJ-9,11,14,25,48, Pinout Scart, Pinout USB, Pinout HDMI, Pinout VGA, Pinout DVI, Pinout RS-232, Pinout FireWire (IEEE1394), Pinout Molex, Pinout Sata, Pinout Apple Lightning, Pinout Apple Dock Connector, Pinout DisplayPort, Pinout PS/2, Fiber optic color code, Pinout led, Pinout Raspberry Pi, Pinout ISO 10487 (Car audio), Pinout OBD II, Pinout XLR (Audio/DMX), Pinout MIDI, Pinout Jack, RCA color coding, Pinout Thunderbolt, Pinout SD Card, Pinout Sim Card, Pinout display LCD 16x2, Pinout IO-Link.

The app also contains a very useful form.