Electronics Calculators
Free online calculators for common electronics calculations. No signup required — just enter your values and get instant results.
Ω
Ohm's Law Calculator
Calculate voltage, current, resistance, or power — enter any two values.
V↓
Voltage Drop Calculator
Find voltage drop across resistors in series and parallel circuits.
LED
LED Resistor Calculator
Calculate the right resistor value for your LED circuit.
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Resistor Color Code Calculator
Decode resistor color bands to find resistance, tolerance, and temperature coefficient.
÷V
Voltage Divider Calculator
Calculate output voltage for a resistor voltage divider circuit.