Physics & Electronics Calculators

Resistor Series Parallel Calculator

Calculate equivalent resistance for series and parallel resistor networks

RC Delay Calculator

Compute RC circuit charge/discharge time constant and delay time

Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's law

Power Consumption Calculator

Compute electrical power and energy consumption

Inductive Reactance Calculator

Calculate inductive reactance from frequency and inductance values

AC Phase Difference Calculator

Compute phase difference and time delay between AC signals

Resistor Color Code Calculator

Decode 4-band and 5-band resistor color codes with tolerance and value

Parallel Resistor Calculator

Calculate equivalent resistance for 2 to 5 resistors in parallel

Series Resistor Calculator

Calculate total resistance for 2 to 6 resistors in series

Resistor Wattage Calculator

Compute power dissipation and select correct resistor power rating

Variable Resistor Divider Calculator

Calculate potentiometer voltage divider output by wiper position

Wheatstone Bridge Calculator

Calculate unknown resistance using balanced bridge equation

Capacitive Reactance Calculator

Compute Xc = 1/(2πfC) with frequency and capacitance support

Capacitance Series Parallel Calculator

Compute total capacitance for capacitors in series or parallel

Capacitor Charge Discharge Calculator

Calculate V(t) during RC charging and discharging with derivation

Capacitor Energy Storage Calculator

Compute stored energy E = ½CV² in capacitors

RC Time Constant Calculator

Compute τ=RC and charge/discharge percentages with time derivation

Inductor Energy Storage Calculator

Compute stored magnetic energy E = ½LI² in inductors

Inductor Series Parallel Calculator

Compute total inductance for inductors in series or parallel

RL Time Constant Calculator

Compute τ=L/R and inductor current rise/decay with derivation

RLC Time Constant Calculator

Compute resonant frequency, damping factor ζ, and classify response

RLC Impedance Calculator

Compute Z magnitude and phase for series and parallel RLC circuits

RLC Resonant Frequency Calculator

Compute f₀ = 1/(2π√LC) with angular frequency and period

RLC Quality Factor Q Calculator

Compute Q factor, damping ζ, and bandwidth for resonant circuits

RLC Bandwidth Calculator

Compute Δf = f₀/Q and lower/upper cutoff frequencies f₁ and f₂

Power Factor Calculator

Compute PF = cos φ = P/S from real, reactive, and apparent power

Real Reactive Apparent Power Calculator

Compute P, Q, S and power triangle from V, I, and phase angle

Kirchhoff Law Calculator

Apply KVL and KCL to solve for unknown voltages and currents

Voltage Divider Calculator

Compute Vout = Vin × R2/(R1+R2) with load effect analysis

Current Divider Calculator

Compute branch currents in parallel resistors using current division rule

Electrical Conductance Calculator

Convert R to G = 1/R in siemens with series and parallel rules

Resistance Temperature Coefficient Calculator

Compute R = R₀(1+αΔT) with material presets for TCR analysis

Diode Forward Voltage Calculator

Calculate IF using Shockley diode equation with type presets

Zener Diode Regulator Calculator

Design shunt regulator: compute Rs, Zener current, and power dissipation

Transistor Beta Gain Calculator

Compute β = IC/IB hFE and verify BJT current relationships

Transistor Biasing Calculator

Design 4-resistor voltage divider bias for BJT amplifier circuits

Decibel dB Calculator

Convert between dB, power ratio, and voltage ratio with derivation

dBm to Watt Converter

Convert dBm to watts and watts to dBm with preset values

Battery Runtime Calculator

Estimate backup hours from battery capacity, voltage, load, and efficiency

Battery Capacity Calculator

Convert Ah, mAh, Wh and calculate capacity from discharge data

Linear Regulator Power Dissipation Calculator

Compute P=(Vin-Vout)×I and junction temperature with thermal analysis

LED Resistor Calculator

Calculate LED current limiting resistor value and resistor power rating

Wire Resistance Calculator

Calculate conductor resistance from resistivity, length, and area

Voltage Drop Calculator

Calculate voltage drop, load voltage, and drop percentage from current and resistance

Fuse Size Calculator

Estimate recommended fuse current from load current and safety factor

Transformer Turns Ratio Calculator

Calculate secondary voltage from primary voltage and coil turns ratio

Joule Heating Calculator

Calculate heat energy and resistive power from current, resistance, and time

RMS Voltage Calculator

Convert sine wave peak voltage to RMS voltage and peak-to-peak voltage

Peak to Peak Voltage Calculator

Convert RMS voltage to peak and peak-to-peak voltage for sine waves

Frequency to Period Calculator

Convert frequency in hertz to period and angular frequency

Wavelength Frequency Calculator

Calculate wavelength from wave speed and frequency using lambda equals v over f

Coulomb Law Calculator

Calculate electric force between two point charges from charge and distance

Electric Field Calculator

Calculate electric field strength from a point charge and distance