Ohm's Law Calculator
Solve V, I, R, P from any two known values.
5 V
Voltage
2 A
Current
2.5 Ω
Resistance
10 W
Power
About this tool
Pick any two of voltage, current, resistance and power — the tool computes the other two using V = IR and P = VI.
Solve V, I, R, P from any two known values.
Pick any two of voltage, current, resistance and power — the tool computes the other two using V = IR and P = VI.