Electronics
Ohm's Law Calculator
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Ohm's Law Calculator
Reactance Calculator
Resistor Color Code Calculator
LED Resistor Calculator
Voltage Divider Calculator
RC Charge Time Calculator
Capacitor Code Calculator
555 Timer Calculator
LM317 Voltage Regulator Calculator
Zener Diode Resistor Calculator
Op-Amp Gain Calculator
Find voltage
Find current
Find resistance
Find power
Current
A
Resistance
Ω
Quick examples
5V / 0.5A
12V / 2A
24V / 4Ω
2A / 6Ω
Assumes a DC circuit or simple resistive load. AC, motors, LEDs, and adapters can differ by power factor and circuit design.
Voltage
12 V
Formula used: V = I × R
Copy result
Voltage
12 V
Current
2 A
Resistance
6 Ω
Power
24 W