General Electronics Calculators

Ohm's Law

Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to solve for the remaining two quantities.

Color Code

Decode resistor color bands to resistance value and tolerance. Supports 4-band, 5-band, and 6-band resistors. Instant color band to ohms conversion.

RC Time Constant

Calculate RC circuit time constant τ, charge time to 63.2% and 99%, and −3dB cutoff frequency. Essential for filter and timing circuit design.

Series/Parallel R·C·L

Calculate the equivalent series and parallel combination of up to four resistors, capacitors, or inductors. Also computes the voltage divider ratio for two-resistor networks.

LC Resonance

Calculate the resonant frequency, characteristic impedance, Q factor, and bandwidth of a series or parallel LC tank circuit. Enter inductance, capacitance, and optional series resistance.

Op-Amp Gain

Calculate op-amp voltage gain, gain in dB, −3 dB bandwidth, and input impedance for inverting, non-inverting, and differential amplifier configurations.