# Advice 1: How to convert MJ to kcal

And Joule and the calorie are units of measurement for the amount of work and energy. Joule is part of a single system of measurement SI, the calorie is a non-si unit. Sometimes calculations are required to translate joules into calories.
Instruction
1
Turn the megajoules to joules. The prefix "Mega" means six, therefore, to count the number of megajoules to joules, you have the original number times 10 to the sixth power, that is, 1 000 000. For example, switch 9 MJ to Kcal. 9 MJ is 9*1 000 000 = 9 000 000 joules. Next, you need to know what calories you need to translate joules, as is the concept of "calorie international" and the concept of "thermochemical calorie". One Joule corresponds to 0,238846 calories or 0,239006 international calorie thermochemical.
2
Translate joules into calories international of using known coefficient of translation: 1 j ≈ 0,238846 calories. In this example, multiply 9 000 000 joules at 0, 238 846, get 2 149 614 cal. Put the resulting number of calories in kilocalories by dividing it by 1 000, get 2 149,6 kilocalories (Kcal). Thus, 9 megajoules fits 2149, 6 calories international. Quickly convert MJ to Kcal is to multiply the original number of MJ by a factor of 238,846 (0,238846*1 000). In this case: 9 MJ*238,846 = 2149,6 Kcal.
3
Translate joules to thermochemical calories using the conversion factor: 1 j ≈ 0,239006 calories. In this example, multiply 9 000 000 joules on 0,239006, get 2 151 054 2 151,1 cal or Kcal. Thus, 9 megajoules corresponds to 2151,1 calories thermochemical.
4
To translate joules into calories, you need to know that 1 calorie corresponds to 4,1868 joules, 1 calorie - 4,1840 joules. Translate calories into joules by multiplying them by the coefficients. For example, calories 500 international matches (500 * 4,1868) 2 093,4 Joule, and 500 thermochemical calories (500 * 4,1840) 2 092 Joule.
Note
To quickly and effortlessly convert joules into calories, you can use the currency Converter.

# Advice 2 : 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 3 : How to convert joules to calories

Joule is a unit of measuring the amount of heat used in the international system of units (SI - Systeme International d'unites). It is often used in physics and in heat has more common non-si unit called "calorie". The parallel existence of these units from time to time is the need of converting values from one to the other.
Instruction
1
Keep in mind that at the present time there are two definitions of calories, one of which is called a "thermochemical calorie" and "calorie international". For the conversion of joules into calories thermochemical to use the ratio in which 1 Joule is approximately equal to 0.239005736 calories. When converted into calories international the ratio should be changed to the value 0.238845897.
2
Use the standard Windows calculator for the practical conversion of one unit to another. The link to the run is placed in the main menu of the OS - click "start" button (or press the Windows key), go to "All programs", and from there to the subsection "Standard". The desired item in this section is called "Calculator". Instead of the travel menu for this purpose you can use the run dialog programs hit the key combination WIN + R, type calc and press Enter.
3
Expand the "View" menu in calculator, select "conversion". Its interface is added to the left panel with a dropdown list of measurement units.
4
Select from the list under "Category" the string "Energy". In the list of "Initial value" set the "Joule". In the list of "Ultimate value", click the "kilocalorie".
5
Enter the value of the original value in joules, and then click "Translate". The calculator will count the given number in international nutrition. To translate the number of calories, multiply the result by a thousand.
6
Use online calculators if for some reason you do not want to use the system. These services are very much in the network, even search engine Google now has a built-in currency Converter. In this search, it is sufficient to formulate a request to compute directly in the input field of the search query and the result will be shown immediately, without pressing any buttons. Google uses for the conversion factor for thermochemical calories.

# Advice 4 : How to convert watts to kcal

Watts, W, W – SI the unit of power was named after its maker, James watt. Watts as a measure of capacity adopted in the 1889, previously used HP – horsepower. Will not be superfluous to know how power can be transferred to other units.
You will need
• calculator.
Instruction
1
To transfer the electrical power (occasionally say heat capacity) to any other unit of measurement, use of data on the ratio of different units. To do this, simply multiply the given number of power ratio that matches the unit of measure in which to translate.
1 Watt-hour is equivalent to only 3.57 kJ;
1 Watt is equal to 107 erg/s; 1 j/s; 859,85 cal/h; 0,00134 HP
For example, the organization pointed out a number 244,23 kW, which should translate into calories.
244,23 kW => 244,23* 1000 watts = 244,23* 1000* 859,85 => = 210 000 000 cal/h or 0.21 G cal/h
2
In the calculations related to power, typically use the standard consoles, especially when the measured value is too small or, on the contrary, large. This simplifies the calculations associated with the order value. Watts by itself is almost never used. Put the multiple number among a form according to the scheme given below.

1 micro (MC) => 1*0,000001
1 mile (m) = > 1*0,001
1 Santi (C) => 1*0,01
1 deci (d) => 1*0,1
1 Deka (da) => 1*10
1гекто (g) => 1*100
1 kilo (K) => 1*1 000
1 Mega (M)=> 1*1 000 000
1 Giga (G) => 1* 1 000 000 000
3
Find out what kind of unit of measure of heat energy required to transfer power. The options are: j or Joule – unit of work and energy; Cal (Calories) is the unit of heat energy, can be written simply as calories, and might look like this – kcal/hour.
Note
Sometimes you have to work with very large numbers, so you can get lost in the conversion of a number to the integer part. Translate power into energy slowly and use a scientific calculator.