Free electrical engineering calculators for students, hobbyists, and professionals.
Calculate voltage, current, resistance, and power.
Decode resistor color bands to find resistance.
Calculate series resistor for LED circuits.
RC time constant and charge/discharge times.
Calculate output voltage and power in divider circuits.
Convert between dBm and Watts for RF engineering.
Calculate RF signal loss over distance for wireless links.
RC cutoff frequency and frequency response.
RC high pass cutoff frequency and response.
Center frequency, bandwidth, and Q factor.