Home/Electrical Calculators/Ohm’s Law

Electrical Calculators

Ohm’s Law

Solve voltage, current, resistance, and power relationships.

01

Inputs

Voltage

V

Resistance

Ω

02

Result & worksheet

10.00 A · 1200.0 W

Recorded summary

Voltage: 120 V
Resistance: 12 Ω
Current: 10.00 A
Power: 1200.0 W

Formula used

I = V ÷ R; P = V × I

Calculation steps

120 ÷ 12 = 10.00 A
120 × 10.00 = 1200.0 W

Assumptions

DC or a purely resistive AC load
Stable resistance
Entered values are compatible RMS quantities

Verify before use

Component voltage and power ratings
Temperature effect on resistance
AC impedance and power factor for nonresistive loads