Watts / Volts / Amps / Ohms Calculator

Enter any 2 of 4 electrical values to calculate the other two.

Power (W)

W

Voltage (V)

V

Current (A)

A

Resistance (Ω)

Ω

Results

Formulas

R = V / I = V² / P = P / I²
I = V / R = P / V = √(P / R)
V = I × R = P / I = √(P × R)
P = V × I = V² / R = I² × R