Ohm's Law Calculator

Enter any two values to calculate the other two instantly.

Voltage (V)

Current (A)

Resistance (Ω)

Power (W)

Enter any 2 of the 4 values above

Calculated values — Calculated from: V+I

Voltage

24

Current

5

Resistance

4.8

Power

120

Key Formulas

V = I × R

I = V / R

R = V / I

P = V × I

P = I² × R

P = V² / R