Ohm's law calculator

Enter any two values. The two you changed last are used; the other two are calculated.

V
A
Ω
W
Result
12 Ω · 1,200 W
Voltage
120 V
Current
10 A
Resistance
12 Ω
Power
1,200 W

How it is calculated

  1. R = V ÷ I, P = V × I

Ohm's law calculator by Calculate.diy.For planning only; check local code.