Electrical calculations

The best electrical calculations always at hand for any electrician!


Wire size
Calculation of voltage drop
Calculation of current
Calculation of voltage
Calculation of active power
Calculation of apparent power [PRO]
Calculation of reactive power [PRO]
Calculation of resistance
Motor from three-phase to single-phase
Capacitor start motor single-phase [PRO]
Calculation rpm motor [PRO]
Motor efficiency [PRO]
Maximum torque [PRO]
Diagram three-phase motor (6 leads)
Diagram three-phase motor (9 leads) [PRO]
Diagram three-phase motor (12 leads) [PRO]
Code resistors 4 colors
Code resistors 5-6 colors [PRO]
Color code inductor [PRO]
Colors resistor from value
SMD resistor code [PRO]
Fuses [PRO]
Sum resistors
Sum capacitors [PRO]
Conversion Δ-Y [PRO]
Conversion HP/KW
Table AWG/mm²
Conversion of section
Conversion cm/inch
Conversion length [PRO]
Conversion voltage (Amplitude) [PRO]
Conversion sin/cos/tg/φ [PRO]
Conversion energy [PRO]
Conversion temperature [PRO]
Conversion pressure [PRO]
Conversion Ah / kWh [PRO]
Conversion Gauss / Tesla [PRO]
Conversion RPM – rad/s – m/s [PRO]
Reactance [PRO]
Impedance [PRO]
Resonant frequency [PRO]
Voltage divider [PRO]
Zener diode as voltage stabiliser [PRO]
Resistance to reduce voltage
Resistance for led
Power factor correction [PRO]
Power factor correction of small loads [PRO]
Power factor correction of transformer MV/LV [PRO]
Battery life [PRO]
Primary/Secondary winding of transformer
Short circuit current [PRO]
Short circuit current with transformer substation [PRO]
Current carrying capacity IEC [PRO]
Current carrying capacity NEC [PRO]
Conductor resistance [PRO]
Table of cables reactance IEC [PRO]
Table of cables reactance NEC [PRO]
Table of resistivity [PRO]
IP/IK/NEMA protection classes
Antenna length [PRO]
Electrical symbols
Electricity around the world
Joule Effect [PRO]
Wiring color codes
SI Prefix

Unit of measurement
Fault current of strings [PRO]

Ethernet wiring (RJ-45) [PRO]

Pinout Ethernet with PoE [PRO]

RJ-11,14,25,48 [PRO]

Pinout Scart [PRO]

Pinout USB [PRO]

Pinout HDMI [PRO]

Pinout VGA [PRO]

Pinout DVI [PRO]

Pinout RS-232 [PRO]

Pinout FireWire (IEEE1394) [PRO]

Pinout molex [PRO]

Pinout Sata [PRO]

Pinout Apple Lightning [PRO]

Pinout Apple Dock Connector [PRO]

Pinout PS/2 [PRO]

Fiber optic color code [PRO]

Pinout led [PRO]

Pinout Raspberry PI [PRO]
Pinout ISO 10487 (Car audio) [PRO]

Pinout XLR (Audio/DMX) [PRO]

Formulary [PRO]


What’s New in 5.1.0 ?

New: Sizing the circuit breaker
New: Calculation of power factor
New: Max wire length
New: Appliance classes
New: Plug & socket types
New: IEC 60320 connectors
New: Buttons layout
Add: Formulary icon into action bar

How to Install ?

  1. Download the given APK to your phone
  2. Install it normally



Electrical Calculations APK  ( 5.2 MB)