Electrical

Find LC cutoff frequency, solve for L or C, and see tolerance range plus signal-side checks for low-pass or high-pass filters.

Calculate ideal LC resonant frequency, or find the inductance or capacitance needed for a target frequency.

Calculate RLC resonant frequency, Q factor, bandwidth, half-power points, and optional impedance at a test frequency.

Find inductive reactance, inductance, or frequency, with unit conversion and optional real-coil current checks.

Calculate ideal capacitive reactance from capacitance and frequency, or find the capacitance or frequency for a target reactance.

Decode 3-digit, 4-digit, R notation, and EIA-96 SMD resistor codes, or create an exact supported marking.

Decode 4-, 5-, and 6-band resistor colors into resistance, tolerance range, temperature coefficient, and direction check.

Split total current across 2 to 10 parallel resistors. Get branch currents, percent share, voltage, power, tolerance range, and checks.

Estimate yearly standby power cost, savings from cutting phantom loads, and payback time for a plug, timer, or power strip.

Find RC high-pass cutoff frequency, resistor, or capacitor, then check gain, phase, reactance, and loading effects.