Electric power Calculator tool
voltage V = R × I (Formula 1)
voltage V = P ÷ I (Formula 2)
power P = V × I (Formula 3)
current I = P ÷ V (Formula 4)
power P = V < SUP> < FONT size = 4> 2 present R (5)
(Formula 5) Example: a heater Resistance is 65Ω, power supply is 220V, find its power
(220×220) ÷65=744W
Resistance Electric power, current, voltage online auto Calculator tool
Please import arbitrarily two values and the third value will be computed。