Electronics Formulas Reference

Comprehensive Calculator and Reference Guide

Professional electronics calculator featuring Ohm's Law calculations, power formulas, resistor networks, capacitor calculations, and frequency analysis. Essential tool for electrical engineers, students, and electronics enthusiasts.

Ohm's Law

U = R × I
Universal Ohm's Law Calculator
U = Voltage (Volts), R = Resistance (Ohms), I = Current (Amperes)
Smart Calculator
Enter any TWO values to calculate the third automatically
Enter two values to see the calculation

Power Formulas

P = U × I
Power equals voltage times current
P = Power (Watts), U = Voltage (Volts), I = Current (Amperes)
Power Calculator (P = U × I)
P = I² × R
Power equals current squared times resistance
P = Power (Watts), I = Current (Amperes), R = Resistance (Ohms)
Power Calculator (P = I² × R)
P = U² / R
Power equals voltage squared divided by resistance
P = Power (Watts), U = Voltage (Volts), R = Resistance (Ohms)
Power Calculator (P = U² / R)

Resistor Networks

R_total = R₁ + R₂ + R₃ + ...
Series resistance calculation
Resistors in series add up directly
Series Resistance Calculator
R_parallel = (R₁ × R₂) / (R₁ + R₂)
Parallel resistance for two resistors
Simplified formula for exactly two parallel resistors
Parallel Resistance Calculator

Capacitor Formulas

Q = C × U
Charge stored in capacitor
Q = Charge (Coulombs), C = Capacitance (Farads), U = Voltage (Volts)
Capacitor Charge Calculator
E = ½ × C × U²
Energy stored in capacitor
E = Energy (Joules), C = Capacitance (Farads), U = Voltage (Volts)
Capacitor Energy Calculator

Frequency & Wavelength

f = 1 / T
Frequency from period
f = Frequency (Hz), T = Period (seconds)
Frequency Calculator
λ = c / f
Wavelength from frequency
λ = Wavelength (meters), c = Speed of light (3×10⁸ m/s), f = Frequency (Hz)
Wavelength Calculator

Electronics Formulas Reference and Calculator - Classical Engineering Reference

Developed by rmingon | View on GitHub