Instruction

1

Put the initial number of kilowatts in watts. For example, power consumption of the electric appliance specified by the manufacturer in the product specification, is equal to 1.5 kilowatts. As you know, a 1 kilowatt - 1 000 watt. Consequently, the power of this device in watts is 1.5 kilowatts x 1 000 = 1 500 watts.

2

Calculate the work done by an electric current in an hour, knowing the definition of watt in relation to the Joule. Since watt is the power which in one second is one Joule is therefore one Joule per second equals one watt. Determine the amount of work in joules committed by an electric current per hour power single W - 1 j x 60 s x 60 min = 3 600 joules. Thus, electric current capacity of 1 watt-hour is the work equal to 3 600 joules. The amount of work performed by an electric current with a power of 1

**kW**during the same time, will be equal to 3 600 000 3 600 joules or**Kj**.3

Calculate the number of joules for device power consumption 1 500 watt. To find the work done per hour by an electric current given power, you need the number of watts multiplied by 3 600. In our example: 1 500 watts * 3 G. 600 = 5 400 000 joules. Translate joules to kilojoules: 5 400 000 / 1 000 = 5 400 kilojoules (kJ). So, to quickly and effortlessly convert kW to kJ, you need the amount of power consumed in kilowatts (

**kW**) multiply by 3 600, having received the amount of electric current in kilojoules performed for one hour.Note

In joules (j) measured work, which can make electric field of one volt per second.

Don't forget that in watts measured power consumption of appliances and watt-hour is characterized by the amount of work performed by this device for one hour.

Don't forget that in watts measured power consumption of appliances and watt-hour is characterized by the amount of work performed by this device for one hour.

# Advice 2: How to convert kilowatts

Kilowatt (kW) is a unit of power, i.e. relations work for the length of time for which it is made. However, the power can be measured in other units, and kilowatts, you can easily transfer to any of them by a simple multiplication method.

You will need

- Calculator or Converter

Instruction

1

Often in solving problems it is necessary to translate

**kilowatts**in such units as joules per second (j/s). It is very simple, because one Joule / second equals one watt. Therefore, to convert**kilowatts**to joules per second, you just need to multiply them by 10 to the third power, i.e. a thousand. For example, 5 kW = 5 x 1000 = 5000 j/s.2

Another common unit of power is horsepower (HP), but it is not included in the SI system. When translating kilowatts in this unit it is important to clarify what kind of horsepower you mean. In our country more often used metric horsepower. One kilowatt is approximately equal to 1.36 metric HP.. And in the US and partly in the UK under the horsepower refers to the horsepower of electric. One kilowatt is approximately 1.34 HP electric.. there is Also a so-called boiler horsepower. Kilowatt is approximately equal to 0.1 HP. boiler Thus, 5 kW x1 36 = 6,8 metric HP, as well as 5 kW x 1.34 = 6,7 electric HP and 5 kW x 0,1 = 0,5 boiler horsepower.

3

In real life, often found this unit as kilocalories per hour (kcal/h). One kilowatt is approximately equal to 859,85 kcal/h. So, 5 kW can be translated in kilocalories per hour to the following: 5 kW x 859,85 = 4299,25 kcal/h.

4

If we are talking about the USA, in some case you can use the old British unit of power is ft-lb per second. Kilowatt is approximately equal to 737,56 ft-lb/s. So 5 kW = 5 x 737,56 = 3687.8 foot-pounds per second. There are a number of non-si units of power, in certain cases, used in the United States and Britain, but not typical for Russia. Translation of a kilowatt in such units can be realized with the help of online converters.

Useful advice

Remember that for translating kilowatts into watts, it is sufficient to multiply the number of kW per thousand (10 to the third power), and for the conversion of kilowatts to megawatts you need to divide this number a thousand (times 10 to the minus third power).

1 kW = 1000 W = 0.001 MW

1 kW = 1000 W = 0.001 MW

# Advice 3: How to convert to joules

Joule (j) is one of the units approved in the SI system. Measured in joules work, energy and quantity of heat. One Joule equals one Newton multiplied by a meter, or watt multiplied by second, or kilograms multiplied by the square metre divided by second squared.

You will need

- Calculator or online unit Converter

Instruction

1

In

**joules**it is easy to transfer the unit of work and energy, adopted in the CGS system is erg. To do this, simply multiply the amount of ergs on 10 in a minus of the seventh degree. So, for example, 500 ergs can be represented in the form of 0.0000001 500 x = 0,00005 George.2

Also in

**joules**can be transferred the information specified in electronvolt (eV) is a non – si unit of energy. However, the result is not exact but approximate. One electron volts is approximately equal to 1.6 times 10 to the negative nineteenth power of George. So, 180000 eV can be converted to**joules**as follows: 180000 x 1.6 x 10 to the minus nineteenth degree = 288 x 10 to the minus thirteen degree j.3

In addition, in

**joules**can be translated work or energy, unit of measure which was chosen by the kilowatt-hour (kWh). For the number of kWh you need to multiply by 3600000. For example, 0,04 kW*h = 144000 j = 144 kilojoules (kJ). The result of such a transfer would not approximate but absolutely exact.4

Another off-system unit easily translated in

**joules**, is the calorie (cal). For this amount of calories must be multiplied by 4,1868. So, cal 815 = 815 x 4,1868 = 3412,242 George. There is also a special unit – the calorie. One calorie is equal to 4,1840 George. Therefore, 23 thermochemical calorie =23 x 4,1840 = 96,232 George.5

At

**joules**you can also convert a number of units used in the British system of measurement. For example, one British thermal unit (BTU, BTU) is approximately equal to 1055,056 George. So, is 0.2 BTU = 0.2 x 1055,056 = 211,0112 George. Convert to**joules**and these other units, you can use any of the many online converters.# Advice 4: How to convert watt to kilowatt

The word power is associated with words engine, car, battery, battery, etc. And no wonder, because power is a physical quantity that shows how fast you are working. Power is measured in

**Watts**, in honor of the English scientist James watt. Watt is denoted as 1W. Theoretically, one watt is one Joule divided by one second (1W=1/1s). In practice it is often found the expression**of kilowatts**, it is also power, but with a different unit of measurement.Instruction

1

For the translation of watt to

**kilowatt**(hereafter, kW), you must know that are multiples of the decimal prefix "kilo" means "thousand" means one**kilowatt**equals one thousand watts (1kW = 1000W). To convert**kilowatts**in watts, multiply this value by one thousand. By multiplying the number by a thousand, the comma is transferred to three digits to the right of the original location among. Example 1. 4 kW = 4000 W, 0.4 kW = 400 watts, 3.5 kW = 3500 W, 89 kW = 89000 watts.2

Sometimes you have to translate from watts to

**kilowatts**. This action back above in the first step of translation. That is, one watt is equal to one thousandth**of a kilowatt**(1 watt = 0,001 kW). Then, when translating, it is necessary to multiply the number of one-thousandth or divided into one thousand, to move the comma in the three digits to the left from the initial position in the number. Example 2. 1000 watts = 1 kW 37 W = 0,037 kW, 5 W = 0,005 kW, 86000 W = 86 kW.Note

A comma in a number is not put, it is behind the last digit in the number.

Useful advice

This action is subject to the transfer of power both mechanical and electric, even if they are calculated by different formulas.

# Advice 5: How to convert watts to joules

Watt is a unit of power in SI system. Has the Russian marking W W. foreign and Named the unit in honor of the inventor James watt. Now in watts measured power of all the appliances, this feature power consumption can be found either on the device or in the user manual.

You will need

- calculator

Instruction

1

Joule is a unit of energy (work), power is linked with the work formula:

N = E / t,

where N is the power in watts, E is energy in joules, t is time in seconds.

That is, power in watts is quantitatively equal to the energy in joules expended in 1 second. So, in order to convert watts to joules per unit time, you don't even need the calculator – view the power of the device in watts and find out how many joules of energy it consumes in 1 second. However, how such a translation can not be called – because power and energy are different physical quantities.

N = E / t,

where N is the power in watts, E is energy in joules, t is time in seconds.

That is, power in watts is quantitatively equal to the energy in joules expended in 1 second. So, in order to convert watts to joules per unit time, you don't even need the calculator – view the power of the device in watts and find out how many joules of energy it consumes in 1 second. However, how such a translation can not be called – because power and energy are different physical quantities.

2

But not always, the power can be expressed in watts, there are other units of power. For example, a horsepower is a unit of measurement, which is deprecated and not actually used in science. Although there is still engine power in cars is specified in horsepower. To convert horsepower to watts, multiply the amount in horsepower at 735.5:

1 HP = 735.5 watts

1 HP = 735.5 watts

3

To determine the power of the current in an electric circuit can use the power meter. This device has two measuring elements: series and parallel coils. In the first coil flows a current proportional to the load, and the second proportional voltage. Turn on the device in an electrical circuit in accordance with the instructions, and then remove readings in watts. Transfer in joules do as above. And if you know the amount of energy required over a period greater than 1 second, the energy in joules look like this:

E = N * t,

where N is the power in watts, and t is time in seconds.

E = N * t,

where N is the power in watts, and t is time in seconds.

4

But this method of transfer capacities in energy is not always fair, especially instant processes. For example, flash in a photo Studio. Don't even try to divide the specified power flash at the time – you will not get the correct power and just wasting your time. The same applies to Studio lighting. It requires to consider many different factors to determine the light flux, therefore, for such purposes, use flashmeter (light meters), they show results much more accurate.

# Advice 6: How to translate W/in the hour W

When calculating the amount of electricity consumed, it is customary to use the term "kilowatt-

**hours**". This value is the actual power consumption device power N kilowatt a number of hours X.Instruction

1

Start to understand what kind of value you need to take into consideration. The fact that very often in the calculation of electricity the concept of kilowatt-

**hours**and kilowatts are confusing. Although kW is power (that is, the amount consumed by the device of energy) and kilowatt-hour is the amount of time consumed per hour.2

Please note that the data on energy consumed on the electric counter indicated in kilowatts. To convert them into watts, multiply the number of kilowatt one thousand. Thus, 1 kilowatt * 1000 = 1000 watts.

3

As watt-

**hours**or kilowatt-**hours**is the amount of watts for a certain period of time, for calculations you must know for what period of time to get the figure. Divide the number of watt-hours by the number of hours for which the calculation is performed.4

For example, you know that in the past month (30 days) consumption of electricity metering devices is 72 kilowatt/hours. Multiply this figure by a thousand. To obtain the number of watts. 68,4*1000=68400 watts/hour. Now divide the resulting figure by 720. That's the number of hours in one month (30*24=720). 68400/720=95 watts. It turns out that in the course of a month constantly burning one light bulb with a power of 95 watts.

5

Remember that the data remain approximate average character, if you produce a General calculation. It is impossible to distinguish one particular appliance. This formula does not take into account the loss of energy. To calculate power watts for a single device you need to connect it to the network in a single copy, included leaving within the hour. The resulting figure will be the desired value. For example, if the network was enabled iron. Potrebu one hour 1500 watt/hour, power consumption of this device would be exactly 1500 watts.