What is the formula for finding power?

Answer 1

The big power Formulas:

Formula 1 - Electrical (electric) power equation: Power P = I × V = R × I² = V² ⁄ R

where power P is in watts, voltage V is in volts and current I is in amperes (DC).

If there is AC, look also at the power factor PF = cos φand φ = power factor angle

(phase angle) between voltage and amperage.

Formula 2 - Mechanical (mechanic) power equation: Power P = E ⁄ t = W ⁄ t

where power P is in watts, energy E is in joules, and time t is in seconds. 1 W = 1 J/s

Scroll down to related links and look at "Formulas and calculations - Electricity and Electric Charge".