Power is the rate of doing work. It is measured in Watts.

$$ P = \frac{W}t $$

Where P is power, W is work, and t is time.

However this is not the only equation for power.

$$ P = \frac{W}t\newline P = \frac{F\times d}{t}\newline P = F \times \frac{d}{t}\newline P = F \times v $$

Where F is force, d is displacement, t is time, and v is velocity. It is important to note that this assumes that the direction of displacement and force is the same($\theta = 0$). When it is not, the formula is $P = F\times v \times \cos\theta$.