Ohm's law, RC circuits, filter design, resistor color codes, PCB trace width, NEC wire sizing, and more.
Calculate voltage, current, resistance, and power using Ohm's Law. Supports AC and DC circuits with power factor.
Decode any resistor's color bands to find resistance and tolerance. Supports 3, 4, 5, and 6-band resistors with reverse lookup.
Use the full Electrical Engineering Calculators calculator
Access all tools, history, worksheets, and cloud sync