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

Calculation

Ohm's lawThree-phase power

U [V]

I [A]

R [Ω]

P [W]

Enter exactly 2 values – the rest are calculated.

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