Ohm's Law & Power
Ohm's law and power triangle (P, Q, S, cos φ) for AC and three-phase.
READY
ohms_law__power.tool
READY
Enter exactly 2 values – the rest are calculated.
Results
Voltage U230 V
Current I2.3 A
Resistance R100 Ω
Power P529 W
// HOW IT WORKS
Ohm's law links voltage, current and resistance. From two known quantities the others follow, as well as the power.
Formulas
U = R · I P = U · I = I²·R = U²/R
Example
U = 24 V, R = 12 Ω → I = 2 A, P = 48 W.
Notes
- Valid for ohmic (linear) resistors.
- Watch the units (mA, kΩ).