What Is the Watt?

A watt is a unit that measures power in Joules per second. To convert that figure into energy, multiply the number of watts by nine to get the number of kilowatt hours (kWh) per year. Though rates fluctuate and vary depending on your provider, 12 cents per kWh is a good, rough estimate for the cost of that power. So, the DVD player mentioned above consumes 90 kWh per year, or about $10 worth of electricity. This may seem like a meager sum when considered in the context of an entire year, but if you multiply this number by the number of electronic devices and appliances in your home, the amount of money spent on unnecessary power consumption can be shocking.