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Megajoules to Kilowatt-hours conversion

Megajoules to Kilowatt-hours conversion table

Megajoules (MJ)Kilowatt-hours (kWh)
00
10.2777777777778
20.5555555555556
30.8333333333333
41.1111111111111
51.3888888888889
61.6666666666667
71.9444444444444
82.2222222222222
92.5
102.7777777777778
205.5555555555556
308.3333333333333
4011.111111111111
5013.888888888889
6016.666666666667
7019.444444444444
8022.222222222222
9025
10027.777777777778
1000277.77777777778

How to convert megajoules to kilowatt-hours?

Sure! Let's start by converting 1 megajoule (MJ) to kilowatt-hours (kWh).

Conversion Formula:

  1. Determine the basic units in terms of Joules:

    • 1 megajoule (MJ) is equal to 1,000,000 joules (J).
    • 1 kilowatt-hour (kWh) is equal to 3,600,000 joules (J).

  2. Convert MJ to kWh: 1 MJ=1,000,000 J3,600,000 J/kWh 1 \text{ MJ} = \frac{1,000,000 \text{ J}}{3,600,000 \text{ J/kWh}}

  3. Perform the division: 1 MJ=1,000,0003,600,000 kWh 1 \text{ MJ} = \frac{1,000,000}{3,600,000} \text{ kWh}

  4. Simplify: 1 MJ=0.27778 kWh 1 \text{ MJ} = 0.27778 \text{ kWh}

So, 1 megajoule is approximately 0.278 kilowatt-hours.

Real-World Examples:

  1. Household Energy Consumption:

    • A 60-watt light bulb burning for 24 hours uses 1.44 kWh.
    • In terms of megajoules, this would be: 1.44 kWh×3,600,000 J/kWh1,000,000 J/MJ=5.184 MJ 1.44 \text{ kWh} \times \frac{3,600,000 \text{ J/kWh}}{1,000,000 \text{ J/MJ}} = 5.184 \text{ MJ} So, a 60-watt light bulb running for 24 hours uses about 5.184 MJ.

  2. Food Energy Content:

    • A medium-sized banana provides approximately 0.48 MJ of energy.

  3. Fuel Energy Content:

    • 1 liter of gasoline contains about 34.2 MJ of energy.

  4. Solar Energy Production:

    • A typical solar panel might generate about 5 kWh per day under sunny conditions.
    • In megajoules: 5 kWh×3,600,000 J/kWh1,000,000 J/MJ=18 MJ 5 \text{ kWh} \times \frac{3,600,000 \text{ J/kWh}}{1,000,000 \text{ J/MJ}} = 18 \text{ MJ} So, a solar panel might generate about 18 MJ of energy per day.

  5. Electric Vehicle Energy Use:

    • An electric vehicle (EV) might use about 15 kWh to travel 100 kilometers.
    • In megajoules: 15 kWh×3,600,000 J/kWh1,000,000 J/MJ=54 MJ 15 \text{ kWh} \times \frac{3,600,000 \text{ J/kWh}}{1,000,000 \text{ J/MJ}} = 54 \text{ MJ} So, an EV might use about 54 MJ to travel 100 kilometers.

These examples illustrate how Megajoules can be used to measure and compare various forms of energy in different contexts.

See below section for step by step unit conversion with formulas and explanations. Please refer to the table below for a list of all the Kilowatt-hours to other unit conversions.

What is megajoules?

A "megajoule" (MJ) is a unit of energy, and it's a big one!

One joule (J) is the amount of energy required to accelerate an object of mass 1 kilogram by a speed of 1 meter per second. It's a small but fundamental unit of measurement.

Now, let's talk about megajoules:

  • One megajoule (MJ) is equal to one million joules.
  • In other words, it's one million times more energy than a single joule.
  • To put this into perspective:
    • The average human walking pace releases about 60 MJ of energy per hour.
    • The kinetic energy of a car traveling at highway speed (about 30 meters per second) is around 5000-6000 MJ.
    • A commercial jet engine produces around 1,000 to 2,000 MJ of thrust per minute.

Megajoules are commonly used in various fields:

  • Energy production and consumption: megajoules are often used to express the energy output or consumption rate of power plants, vehicles, or industrial processes.
  • Physics and engineering: megajoules can represent the kinetic energy of moving objects, like spacecraft or large machinery.
  • Climate science: megajoules are used to quantify the energy associated with greenhouse gas emissions from human activities.

In summary, a megajoule is an enormous unit of energy, representing one million times more power than a single joule. Its usage can be found in various scientific and technical contexts.

What is kilowatt-hours?

A Kilowatt-hour is a unit of energy and its units, kWh, are formed with W for watt and h for hour from SI unit system combined with letter k, metric prefix, for 1,000 or 10310^3. Its definition, in the context of electricity, is the energy of one watt power flowing for one hour.

Followings equivalent equations are identical but in different units. Please note that factor 10310^3 is representing Kilo prefix in kWh unit.

1kWh=103∗Pt=103∗IVt=3600∗103∗J=2.247∗1022∗103eV=8.598∗105∗103cal1 kWh = 10^3*Pt = 10^3*IVt = 3600 * 10^3*J = 2.247 * 10^{22} * 10^3 eV = 8.598*10^5 * 10^3 cal

P−PowerP - Power
t−Time (in hours. Multiply by 3600 to convert to seconds)t - Time \text{ (in hours. Multiply by 3600 to convert to seconds)}
I−CurrentI - Current V−VoltsV - Volts
J−JoulesJ - Joules
eV−ElectronvolteV - Electronvolt
cal−Caloriescal - Calories

Wikipedia page for Kilowatt-hour (watt-hour redirected to kWh) UCI article on Energy Units and Conversions Ian Woofenden's explanation on difference between Watts and Watt-Hours

Complete Megajoules conversion table

Enter # of Megajoules
Convert 1 MJ to other unitsResult
Megajoules to Watt-seconds (MJ to Ws)1000000
Megajoules to Watt-minutes (MJ to Wm)16666.666666667
Megajoules to Watt-hours (MJ to Wh)277.77777777778
Megajoules to Milliwatt-hours (MJ to mWh)277777.77777778
Megajoules to Kilowatt-hours (MJ to kWh)0.2777777777778
Megajoules to Megawatt-hours (MJ to MWh)0.0002777777777778
Megajoules to Gigawatt-hours (MJ to GWh)2.7777777777778e-7
Megajoules to Joules (MJ to J)1000000
Megajoules to Kilojoules (MJ to kJ)1000
Megajoules to Gigajoules (MJ to GJ)0.001
Megajoules to calories (MJ to cal)239005.73613767
Megajoules to Kilocalories (MJ to kcal)239.00573613767

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