This app contains electrical calculations, electronic calculations, lighting calculations, motor calculations and conversions.

Electrical:
Calculation of Wire Size
Calculation of Voltage Drop
Calculation of Voltage
Calculation of Current
Calculation of Power
Calculation of Power Factor
Calculation of Resistance
Calculation of Impedance
Calculation of Reactance
Calculation of Impedance (from Resistance and Reactance)
Conductor Resistance
Maximum Wire Length
Sizing the Circuit Breaker
Current Carrying Capacity of Insulated Conductors
Current Carrying Capacity of Bare Conductors
Calculation of Cable Temperature
Calculation of Power Losses in Cable
Admissible Let-Through Energy of the Cable (K²S²)
Short-Circuit Current Min
Neutral Current
Earthing System
Lightning Protection Level
Risk Assessment of Overvoltages with Atmospheric Origin
Capacitor Power at Different Voltage
Power Factor Correction
Power Factor Correction of Transformer MV/LV
Primary/Secondary Winding of Transformer

Electronics:
BJT DC Analysis
BJT AC Analysis
FET DC Analysis
FET AC Analysis
Filter Calculator
Op-Amp Calculator
NE555 Calculator
Voltage Regulator Calculator
Voltage Divider
Current Divider
Resonant Frequency
Wheatstone Bridge
Zener Diode as Voltage Stabiliser
Resistance to Reduce Voltage
Resistance for LED
Battery Life
UPS Battery Size and Runtime
Temperature Sensors
Antenna Length

Basics:
Connection of Resistor
Connection of Inductor
Connection of Capacitor
Standard Resistor Values
Resistor Color Code
Resistor Colors from Value
Inductor Color Code
SMD Resistor Code
Capacitor Code
Table of Capacitor Codes
Table of Inductor Codes
Fuses Color Code

Lighting:
Calculation of Total Flux
Calculation of Luminaires Number
Illuminance on the Surface
Power Supply for Strip LED
Color Codes of Fluorescent Tubes

Solar:
PV String Sizing
Fault Current of Strings

Motor:
Calculation of Motor Current
Calculation of Motor Power
Calculation of Motor Power Factor
Calculation of Motor Efficiency
Calculation of Motor Torque
Calculation of Motor RPM
Calculation of Motor Slip
Motor Power Factor Correction
Motor from Three-Phase to Single-Phase
Motor Single-Phase Starting Capacitor
Motor Voltage Unbalance
Motor Current Unbalance
Motor Insulation Class
Motor Terminals Marking

Conversions:
Δ-Y (Delta/Star)
kWh-Ah
Power
Voltage
Section
Trigonometric
Angle
Angular-Linear Velocity
Length
Energy
Pressure
Torque
Magnetic
Temperature
Volume
Weight
Time
Luminance
Illuminance
Lumens-Lux
Lumens-Watts
Lumens-Candela
Lux-Watts
Lux-Candela
Lux-Foot Candle
Luminance-Exposure Value
Illuminance-Exposure Value
RGB-CMYK
RGB-HEX
Kelvin-RGB