Compute V, I, R, P from any two known values. Uses V=IR and P=VI=I²R=V²/R . Enter key=value pairs like V=12V and I=2A .
V = Voltage (Volts) · I = Current (Amperes) · R = Resistance (Ohms) · P = Power (Watts)
Supported units: V, mV, kV · A, mA, μA · Ω, kΩ, MΩ · W, mW, kW
marduc812
2026