The conversion to kWh is take the watt consumption per hour, divide it by 1,000 ... According to the energy use chart, a laptop computer typically uses 50 watts and will cost less than a penny ...

text{power (kilowatt, kW)}\times{\text{time (hour, h)}}\) Note that power is measured in kilowatts here, instead of the more usual watts. To convert from W to kW you must divide by 1,000.

How is it different than a watt? How can you ... an LED bulb that uses 8 to 12 watts and has a lumen rating of 800 to get the same illumination. This conversion chart will help you find an LED ...

Watts are like the rate of the water flow.* Units like kW are measures of power. Units like kWh are measures of energy (like a cup of water). Power multiplied by hours gives you units like kWh.