Enter any two known values and press "Calculate" to solve the others. Fields should be reset to 0 before each new calculation. Voltage (E) = Current (I) * Resistance (R) Power (watts) = Current Squared (I^2) * Resistance (R) Power = I*E = E^2 / R

Voltage (E) = Current (I) * Resistance (R) Power (watts) = Current Squared (I^2) * Resistance (R) Power = I*E = E^2 / R