How to correctly calculate the electricity consumed per month.
Let's start with the simplest - the duration of a light day. In summer, the light day is much longer, it gets light early and darkens late, and accordingly we spend much less electricity for lighting. With regard to the onset of autumn and winter, when the light day is very short and most of the time we try to spend at home, the consumption also increases accordingly. And this immediately affects the meter readings. 
With the example of a conventional 100 W / 0.1 kW incandescent bulb, calculate the actual electricity consumption per month. For this, the power must be multiplied by the lamp operating time( approximately 9 hours per day) and multiplied by the number of days.
0.1 kW * 9 hours * 30 days = 27 kWh. This figure is multiplied by the number of lamps, and accordingly the consumption also increases.
But besides the bulbs that provide us with lighting, there is a considerable amount of household appliances and appliances that simply flooded our apartments and have different power consumption. Therefore, when buying equipment, always pay attention to the economy class. The most economical is the indicator of class A, such devices consume the least amount of energy.
So, in order for the to calculate electricity, we need to know:
How to calculate the payment for electricity.
To accurately account for energy consumption in each apartment or house, a device is installed that summarizes the actual consumption - it is an electricity meter, the evidence of which we take and pay each month. In order to correctly calculate the monthly power consumption, it is necessary to subtract the initial readings from the current readings. The figure will be the indicator of the expenditure per month. 
But in order to calculate the payment for light, it is necessary to take into account many indicators, for example, to know the current tariff set in your region, i.e.cost of 1 kilowatt-hour.
According to the existing tariffs in Ukraine from May 2012 you will pay:
- 28.02 kopecks.
- 36.48 kopecks per 1 kW / hour( if the flow exceeds 150 kW / h per month)
Another thing you need to know is what kind of meter you use:
- One-tariff( fixed payment, which is valid during the day)
- Two-tariff( payment depends on the time of day)
To calculate how much your payment per month will be, you will need:
- Determine what kind of meter you use;
- Remove the current readings of the electric meter that you see on the dial;
- From this figure you take away the indication that the receipts for payment are indicated in the column "initial indicator" of
- . The resulting number must be multiplied by the current tariff( taking into account the difference in consumed electricity).
- The final result is the amount to be paid in the current month.
Correctly and correctly calculating the actual consumption of electricity and the cost of it, you will learn to save significant amounts of money from the family budget.
