When calculating quantity of the consumed electric power it is accepted to use the concept "kilowatt-hours". This size is the actual expense of the electric power the N kilowatts device for a number of hours of X.
Instruction
1. For a start sort out what size you need to take into account. The fact is that it is very frequent when calculating the electric power a concept kilowatt-hours and kilowatts confuse. Though kilowatts are a power ( that is amount of the energy consumed by the device), and the kilowatt-hour is amount of the consumed time in an hour.
2. Take into consideration that data on the consumed energy on the electric counter are specified in kilowatts. To transfer them to watts, increase number of kilowatts by one thousand. Thus, 1 kilowatt * 1000 = 1000 watts.
3. As watt-hours or kilowatt-hours are the number of watts for a certain period, for carrying out calculations it is necessary to know for what period the figure is taken. Divide the number of watt-hours into a number of hours for which calculation is made.
4. For example, you know that in a month (30 days) the electric power expense on metering devices makes 72 kilowatts/hour. We multiply this figure by one thousand. To receive number of watts. 68.4*1000=68400 watts/hour. Now we will divide the received figure into 720. It is so much hours in one month (30*24=720). 68400/720=95 watts. Then that within a month one 95 watts electric bulb constantly burned.
5. Remember that these data will have approximate average character if you make the general calculation. Here it is impossible to allocate one concrete electric device. This formula does not consider also energy loss. For calculation of power of watts for the separate device it is necessary to connect it to network in a single copy, having left included within an hour. The received figure will also be required size. For example, if the network switched on the electroiron. Having consumed 1500 watts/hour in one hour, the power consumption of this device will be 1500 watts.