Almost every electrical device contains information necessary for the user, which an uninformed person simply may not understand. This information is related to technical characteristics and may not mean anything to the average person. For example, many electrical sockets or plugs, as well as meters and machines, are marked in Amperes. And on other electrical appliances there is a power marking in Watts or Kilowatts. How to convert amperes to kilowatts in order to understand which and where device can be used safely?
Convert amperes to kilowatts? Easily!
To select an automatic machine of a certain load that would ensure optimal operation of any device, you need to know how to integrate one information or data into another. Namely, how to convert amperes to kilowatts.
In order to accurately perform such a calculation, many experienced electricians use the formula I=P/U, where I are amperes, P are watts, and U are volts. It turns out that amperes are calculated by dividing watts by volts. For example, an ordinary electric kettle consumes 2 kW and is powered from a 220 V network. In this case, to calculate the current amperage in the network, we apply the above formula and get: 2000 W / 220 V = 9.09 A. That is, when the kettle is turned on it consumes more than 9 amperes of current.
Online calculator
On numerous sites on the network, to find out how many amperes are in 1 kW, the table and many others are given with all detailed explanations. These tables also indicate how to calculate the number of kilowatts in the most common cases when it comes to voltages of 12, 220 and 380 volts. These are the most common networks, so the need for calculations arises specifically in relation to these networks.
In order to calculate and convert amperes to kilowatts, you do not need to graduate from special educational institutions. Knowing just one formula helps solve many problems at the household level and be sure that all household appliances in the house are operating in optimal mode and are reliably protected.
| Power W, at voltage in V | |||
| A | 12 | 220 | 380 |
| 1 | 12 | 220 | 380 |
| 2 | 24 | 440 | 760 |
| 3 | 36 | 660 | 1140 |
| 4 | 48 | 880 | 1520 |
| 5 | 60 | 1100 | 1900 |
| b | 72 | 1320 | 2280 |
| 7 | 84 | 1540 | 2660 |
| 8 | 96 | 1760 | 3040 |
| 9 | 108 | 1980 | 3420 |
| 10 | 120 | 2200 | 3800 |
| 11 | 132 | 2420 | 4180 |
| 12 | 144 | 2640 | 4560 |
| 13 | 156 | 2860 | 4940 |
| 14 | 168 | 3080 | 5320 |
| 15 | 180 | 3300 | 5700 |
| 16 | 192 | 3520 | 6080 |
| 17 | 204 | 3740 | 6460 |
| 18 | 216 | 3960 | 6840 |
| 19 | 228 | 4180 | 7220 |
| 20 | 240 | 4400 | 7600 |
| 21 | 252 | 4620 | 7980 |
| 22 | 264 | 4840 | 8360 |
| 23 | 276 | 5060 | 8740 |
| 24 | 288 | 5280 | 9120 |
| 25 | ZSO | 5500 | 9500 |
| 26 | 312 | 5720 | 9880 |
| 27 | 324 | 5940 | 10260 |
| 28 | 336 | 6160 | 10640 |
| 29 | 348 | 6380 | 11020 |
| 30 | 360 | 6600 | 11400 |
Electricity is the power source for many modern gadgets and digital devices.
Many people are interested in how much a kilowatt of electricity costs in different countries and cities around the world.
Price for power supply in Russia
Different cities and regions have their own numbers (gas stove/electric stove, RUR/kW):
- St. Petersburg - 4.32 / 3.24;
- Barnaul - 3.81 / 3.05;
- Vladivostok - 3.54 / 2.83;
- Volgograd - 4.02 / 2.81;
- Krasnodar - 4.44 / 3.11;
- Voronezh - 3.53 / 2.47;
- Yekaterinburg - 3.71 / 2.6;
- Izhevsk - 3.57 / 2.5;
- Irkutsk - 1.01 / 1.01;
- Kazan - 3.56 / 2.49;
- Novosibirsk - 2.49 / 2.49;
- Omsk - 3.68 / 2.58;
- Tolyatti - 3.84 / 2.69;
- Chelyabinsk - 2.03 / 2.12;
- Khabarovsk - 4.27 / 2.99.
After the expiration of this period, the authorized bodies will review how much a kilowatt of electricity costs.
What do the prices depend on:
- In Russia, how much a kilowatt of light costs in homes depends on the type of stove used: gas or electric. In houses with a gas stove, the average price per 1 kW by 1-1.5 rub. more.
- From the locality: city or village. The figure for how much a kilowatt/hour costs in a village is 30% less than in a city. PGT, cottage and dacha settlements are not subject to the rural preferential tariff.
- Climatic features of the region.
- From the selected tariff. In Russia, you can choose from 3 tariffs, which will be used to calculate how much 1 kilowatt of electricity costs for a certain period: 3-zone, 2-zone and single-rate.
Price in the capital
Average price in Moscow (kW/RUB):
- house with gas stove - 5.38;
- with electric - 4.04.
The cost according to different tariffs in the capital is as follows:
- Single bet - 5,38 RUR/kW ,
- Dual zone. During the day from 7:00 to 23:00 - 6,19 rub./kW. At night from 23:00 to 7:00 - 1,79 rub./kW.
- Three-zone. During peak hours - 6,46 rub./kW (7-10 and 17-21 hours). At half peak time - 5,3 rub./kW (10-17 and 21-23 hours). And at night from 23:00 to 7:00 - 1.79 rubles/kW.
How much electricity do electrical appliances consume on average (kWh/month):
- refrigerator - 30;
- washing machine - 25;
- vacuum cleaner - 3;
- iron - 10;
- electric kettle - 15;
- water heater - 80;
- air conditioning - 75;
- lighting devices - 50;
- computer - 10;
- TV - 30.
As you can see, the water heater consumes the most energy - 80 kW.
According to the one-rate tariff in the capital, the price of electricity required to operate the boiler is 430 rubles. per month .
A vacuum cleaner consumes the least electricity; its operating cost is 16 rubles. per month .
Social norms
Social norms for electricity consumption began to be practiced in Russia in September 2013.
According to these tariffs, a certain amount of kWh is given per person living in a dwelling for a month.
If more electricity is used than the established norm, the price for the energy used above the norm increases by an average of 30%.
For example, in the Oryol region (kWh):
- 1 person 190.
- for the 2nd person it is given - 50.
- for 3-5 family members - 20.
It is expected that the tariff system in the country will develop.
This will complicate the calculation of how much a kilowatt costs in 2018-2019.
The value of energy for legal entities
Electricity suppliers must publish monthly prices for their products for organizations and enterprises on their official resources.
The cost is calculated according to the following conditions:
- voltage level;
- price category chosen by the consumer;
- maximum power.
Some suppliers develop special calculators for calculating the price of electricity to consumers.
For example: Mosenergosbyt.
World prices for individual countries
Prices for how much a kilowatt of electricity cost in different countries of the world in 2017 (in US dollars per kilowatt/hour):
- India - 0.08.
- China and South Africa - 0.09.
- Brazil - 0.14.
- Czech Republic - 0.15.
- Canada - 0.16.
- Poland - 0.17.
- Finland and Slovenia - 0.18.
- Netherlands, France - 0.2.
- USA - 0.21.
- Austria, Sweden - 0.22.
- England - 0.24.
- Portugal - 0.25.
- Belgium, Spain - 0.26.
- Italy - 0.29.
- Germany - 0.33.
Some countries abroad, such as Germany, do not have a monopoly on the supply of electricity.
The system of units called SI (abbreviation of the full name in French) is international. With rare exceptions, it is used in almost all countries. In fact, this is a modern (transformed, modernized) version of the metric system that is familiar to us, only unlike it, it is used to measure physical quantities.
The question “how many watts are in a kilowatt,” on the one hand, is quite simple (for those who have not forgotten high school), on the other hand, it requires some clarification. This is the author's task.
The prefix “kilo”, independent of the physical quantity that is expressed by a specific figure or number, means “x 1,000”. That is, 1 km = 1,000 m, 1 kg = 1,000 g and so on. The same goes for power – 1 kW = 1,000 W.
Therefore, in order to understand how many watts are in a kilowatt, you need to multiply them by 1,000. Or, as they say, shift the decimal point in the number 3 positions to the right.
Examples
| kW | W |
| 0,5 | 500 |
| 1,25 | 1 250 |
| 3,075 | 3 075 |
| 10,98 | 10 980 |
| 0,001 | 1 |
Often the confusion is associated with the substitution of concepts. The fact is that there is such a unit of measurement as kW/hour. But this is a numerical expression not of power, but of the amount of energy consumed by a device (or group of devices). Sometimes they say - work completed (in any case, it is meant - per unit of time). This is what they measure, installed in apartment or entrance panels.
Example
An electric heater with a power of 2,000 W (= 2 kW) will consume 2,000 x 1 = 2 kW/hour in 1 hour of operation. Accordingly, in 6 hours of continuous operation it “eats” 12 kW/hour (2 x 6 = 12).
Kilowatt is a multiple unit derived from "Watt"
Watt
Watt(W, W) - system unit of power measurement.
Watt- a universal derived unit in the SI system, having a special name and designation. As a unit of measurement of power, the "Watt" was recognized in 1889. It was then that this unit was named in honor of James Watt (Watt).
James Watt - the man who invented and made a universal steam engine
As a derived unit of the SI system, "Watt" was included in it in 1960.
Since then, the power of everything has been measured in Watts.
In the SI system, in Watts, it is allowed to measure any power - mechanical, thermal, electrical, etc. The formation of multiples and submultiples of the original unit (Watt) is also allowed. To do this, it is recommended to use a set of standard SI prefixes, such as kilo, mega, giga, etc.
Power units, multiples of watts:
- 1 watt
- 1000 watts = 1 kilowatt
- 1000,000 watts = 1000 kilowatts = 1 megawatt
- 1000,000,000 watts = 1000 megawatts = 1000,000 kilowatts = 1 gigawatt
- etc.
Kilowatt hour
There is no such unit of measurement in the SI system.
Kilowatt hour(kWh, kW⋅h) is an off-system unit that is derived solely to account for used or produced electricity. Kilowatt-hours measure the amount of electricity consumed or produced.
The use of “kilowatt-hour” as a unit of measurement in Russia is regulated by GOST 8.417-2002, which clearly indicates the name, designation and scope of “kilowatt-hour”.
Download GOST 8.417-2002 (downloads: 3088)
Excerpt from GOST 8.417-2002 “State system for ensuring the uniformity of measurements. Units of quantities", clause 6 Units not included in the SI (fragment of table 5).
Non-systemic units acceptable for use along with SI units
What is a kilowatt hour for?
GOST 8.417-2002 recommends using “kilowatt-hour” as the basic unit of measurement for accounting for the amount of electricity used. Because “kilowatt-hour” is the most convenient and practical form that allows you to obtain the most acceptable results.
At the same time, GOST 8.417-2002 has absolutely no objection to the use of multiple units derived from “kilowatt-hour” in cases where this is appropriate and necessary. For example, during laboratory work or when accounting for generated electricity at power plants.
The resulting multiple units of “kilowatt-hour” look like this:
- 1 kilowatt-hour = 1000 watt-hour,
- 1 megawatt-hour = 1000 kilowatt-hour,
- etc.
How to write kilowatt-hour correctly⋅
Spelling of the term “kilowatt-hour” according to GOST 8.417-2002:
- The full name must be written with a hyphen:
watt-hour, kilowatt-hour - The short notation should be written separated by a dot:
Wh, kWh, kW⋅h
Note Some browsers misinterpret the HTML code of the page and instead of a period (⋅) display a question mark (?) or other gibberish.
Analogues of GOST 8.417-2002
Most of the national technical standards of current post-Soviet countries are linked to the standards of the former Union, therefore, in the metrology of any country in the post-Soviet space, you can find an analogue of the Russian GOST 8.417-2002, or a link to it, or its revised version.
Designation of power of electrical appliances
It is common practice to mark the wattage of electrical appliances on their casing.
The following designation of electrical equipment power is possible:
- in watts and kilowatts (W, kW, W, kW)
(designation of mechanical or thermal power of an electrical appliance) - in watt-hours and kilowatt-hours (Wh, kW⋅h, W⋅h, kW⋅h)
(designation of consumed electrical power of an electrical appliance) - in volt-amperes and kilovolt-amperes (VA, kVA)
(designation of the total electrical power of an electrical appliance)
Units of measurement for indicating the power of electrical appliances
watt and kilowatt (W, kW, W, kW)- units of measurement of power in the SI system. Used to indicate the total physical power of anything, including electrical appliances. If there is a designation on the body of an electrical unit in watts or kilowatts, this means that this electrical unit, during its operation, develops the specified power. As a rule, the power of an electrical unit, which is a source or consumer of mechanical, thermal or other type of energy, is indicated in “watts” and “kilowatts”. In “watts” and “kilowatts” it is advisable to denote the mechanical power of electric generators and electric motors, the thermal power of electric heating devices and units, etc. The designation in “watts” and “kilowatts” of the produced or consumed physical power of an electrical unit occurs on the condition that the use of the concept of electrical power will confuse the end user. For example, for the owner of an electric heater, the amount of heat received is important, and only then the electrical calculations.watt-hour and kilowatt-hour (W⋅h, kW⋅h, W⋅h, kW⋅h)— non-system units of measurement of consumed electrical energy (power consumption). Power consumption is the amount of electricity consumed by electrical equipment per unit of operating time. Most often, “watt-hours” and “kilowatt-hours” are used to indicate the power consumption of household electrical equipment, according to which it is actually selected.
volt-ampere and kilovolt-ampere (VA, kVA, VA, kVA)— SI units of electrical power, equivalent to watt (W) and kilowatt (kW). Used as units of measurement for apparent AC power. Volt-amps and kilovolt-amps are used in electrical calculations in cases where it is important to know and operate with electrical concepts. These units of measurement can be used to indicate the electrical power of any AC electrical appliance. Such a designation will best meet the requirements of electrical engineering, from the point of view of which all alternating current electrical appliances have active and reactive components, therefore the total electrical power of such a device should be determined by the sum of its parts. As a rule, the power of transformers, chokes and other purely electrical converters is measured and denoted in “volt-amperes” and their multiples.
The choice of units of measurement in each case occurs individually, at the discretion of the manufacturer. Therefore, you can find household microwave ovens from different manufacturers, the power of which is indicated in kilowatts (kW, kW), in kilowatt-hours (kWh, kW⋅h) or in volt-amperes (VA, VA). And the first, and the second, and the third will not be a mistake. In the first case, the manufacturer indicated the thermal power (as a heating unit), in the second - the consumed electrical power (as an electrical consumer), in the third - the total electrical power (as an electrical appliance).
Since household electrical equipment is low-power enough to take into account the laws of scientific electrical engineering, then at the household level, all three numbers are practically the same
Considering the above, we can answer the main question of the article
Kilowatt and kilowatt-hour | Who cares?
- The biggest difference is that a kilowatt is a unit of measurement for power, while a kilowatt-hour is a unit of measurement for electricity. Confusion and confusion arises at the household level, where the concepts of kilowatt and kilowatt-hour are identified with the measurement of the produced and consumed power of a household electrical appliance.
- At the level of a household electrical converter device, the only difference is in the separation of the concepts of output and consumed energy. The output thermal or mechanical power of an electrical unit is measured in kilowatts. The consumed electrical power of an electrical unit is measured in kilowatt-hours. For a household electrical appliance, the figures for generated (mechanical or thermal) and consumed (electrical) energy are almost the same. Therefore, in everyday life there is no difference in what concepts to express and in what units to measure the power of electrical appliances.
- Linking the units of measurement kilowatt and kilowatt-hour is applicable only for cases of direct and reverse conversion of electrical energy into mechanical, thermal, etc.
- It is completely unacceptable to use the unit of measurement “kilowatt-hour” in the absence of an electricity conversion process. For example, “kilowatt-hour” cannot measure the power consumption of a wood heating boiler, but it can measure the power consumption of an electric heating boiler. Or, for example, in “kilowatt-hour” you cannot measure the power consumption of a gasoline engine, but you can measure the power consumption of an electric motor
- In the case of direct or reverse conversion of electrical energy into mechanical or thermal energy, you can link the kilowatt-hour with other energy units using the online calculator at tehnopost.kiev.ua:
If you are interested in the question of how many watts are in a kilowatt, then you will find the answer by reading this article. What is a watt? It is a unit adopted by the International System of Measurement (SI). It got its name thanks to a mechanic-inventor of Scots-Irish origin who created a universal steam engine. Until 1882, most calculations used horsepower as the basic unit of measurement, and only after the invention of mechanics, a new unit of power, the watt, was adopted everywhere (primarily in electrical engineering). In physics, power is a process per unit of time; accordingly, one watt will be equal to one joule per second (W = J/s).
How many watts are in a kilowatt
People are constantly faced with the concept of electrical power in everyday life. All household appliances have a value indicated in their passport. Even the elementary one on the glass bulb says: 40 W, 60 W, 100 W, etc. As for a microwave oven or washing machine, the value in question here will be much higher: 500-1000 W and 2-2.5 kW respectively.
As with other physical quantities, the prefix “kilo” means a multiple of a thousand. That is, the numerical value of power, measured in kilowatts, must be multiplied by 1000 or the decimal point moved to the right by three digits: this way we get the value of electrical power in watts.
Thus, to the question of how many watts are in a kilowatt, we received a clear answer: there are a thousand watts in one kilowatt (1 kW = 1000 W). Next, we will look at examples of recording electrical power. Here are some examples of how to translate the indicated quantities:
- 2.5 kW = 2500 W.
- 0.2 kW = 200 W.
- 3.095 kW = 3095 W.
Sometimes it is necessary to convert a unit of power expressed in watts into kilowatts. We remember how many watts are in a kilowatt, so we divide the known value by a thousand. Or move the comma sign three digits to the left.
- 2750 W = 2.7 kW.
- 70 W = 0.07 kW.
- = 0.15 kW.
Let's look at the concept of “kilowatt-hour”
In kilowatt-hours (or in watt-hours) the device is measured for one hour of operation. As an example, let's take a regular computer with a power of 0.65 kW. Let's assume he worked for one hour. How can I find out how much electricity it has consumed during this period? It’s very simple: multiply 0.65 kW by 1 hour of operation, we get 0.65 kWh. An ordinary 100-watt incandescent lamp consumes 100 W of energy in one hour, therefore, per day of continuous operation it will consume 2.4 kW. How many watts are in kW, we have already discussed above.
Main household consumers of electricity
Nowadays, even wealthy people have begun to think about saving energy - they are abandoning incandescent lamps and replacing them with energy-efficient light bulbs or LED ones. When choosing household appliances, the main parameter that you especially pay attention to is the efficiency of the devices. In every house or apartment you can find such equipment as a refrigerator, TV, computer, iron, electric kettle. Let's consider the mentioned units. The refrigerator usually operates around the clock, its energy consumption rate will be from 0.7 to 1.3 kW per day - everything will depend on the size of the device and the ambient temperature. A computer, provided it has not been turned off, can consume up to 13.5 kW per day. On average, a TV consumes 2.5 kW in 24 hours. However, the biggest “spenders” are heating devices: electric kettles, boilers, electric stoves and others. For example, an electric kettle consumes 1-1.2 kW in 20-25 minutes, which can be compared to a continuously running refrigerator. How much electricity do you consume?