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Physics & Electronics Calculators

53 free physics and electronics calculators for circuits, power, signals, batteries, and fields.

Electronics & Physics 53 tools

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

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