# Electrical engineering calculator

#### Online calculator electrical engineering functions

### Basics

Battery Capacity

Capacitor Capacitance

Decibel, votage, power converter

Decibel - factor converter

Electric Power

Electric Energy

Electric Charge

Electrostatic force, Coulombs Law

Internal resistance of a power source

Ohm's law and power

Table of temperature coefficients

Temperature drift of resistance

Voltage drop

Wire resistance

### AC

Alternating voltage values

Alternating voltage and time

Frequency and wavelength

Alternating voltage value and angle

Frequency and periodic time

RMS value of a sinusoidal oscillation

RMS value of a sinusoidal oscillation with offset

RMS value of a sine pulse (half-wave rectification)

RMS value of a sine pulse (full-wave rectification)

RMS value of a square wave voltage

RMS value of a square pulse

RMS value of a triangle voltage

RMS value of a triangular pulse

RMS value of a sawtooth voltage

RMS value of a sawtooth pulse

### Circuits with resistors

Total resistance of a resistor in parallel

Parallel- total resistance of 2 resistors

Series resistance for a voltmeter

Parallel resistance for an ampere meter

Voltage divider

Loaded voltage divider

Pi Attenuator

T Attenuator

### Circuits with capacitors

Series connection with several capacitors

Series connection with two capacitors

Reactance Xc of a capacitor

Time constant of an R/C circuit (low pass)

Capacitor charging voltage at a time

Capacitor discharge voltage at a time

R/C for the charging voltage at a time

Series circuit R/C

Parallel circuit R/C

Low pass-filter R/C

High pass-filter R/C

Integrator R/C

Differentiator R/C

Cutoff-frequency R,C

R and C for a given impedance

### Circuits with inductors

Inductance

Reactance of a coil

Cutoff frequency R/L

Differentiator R/L

Highpass filter R/L

Lowpass filter R/L

Series circuit R/L

Parallel circuit R/L

Transformer

### Capacitor and inductors

Resonant frequency f0 calculator

Resistors-capacitors-inductors series circuit

Resistors-capacitors-inductors parallel circuit

Resonance of RCL parallel circuit

Resonance of RCL series circuit

### Electronics

LED resistor

Zener diode resistor (variable)

Zener diode resistor (fix)

### Loudspeaker

Loudspeaker crossover 6 dB

Loudspeaker crossover 12 dB

Loudspeaker crossover 18 dB

### Simple Electrics

Watt from Ampere, Volt

VA from Ampere, Volt

Ampere from Watt, Volt

Speaker wire resistance