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Milliwatt-hours to Megajoules conversion

Milliwatt-hours to Megajoules conversion table

Milliwatt-hours (mWh)Megajoules (MJ)
00
10.0000036
20.0000072
30.0000108
40.0000144
50.000018
60.0000216
70.0000252
80.0000288
90.0000324
100.000036
200.000072
300.000108
400.000144
500.00018
600.000216
700.000252
800.000288
900.000324
1000.00036
10000.0036

How to convert milliwatt-hours to megajoules?

Certainly! To convert milliwatt-hours (mWh) to megajoules (MJ), you need to follow a two-step process, as they are different units of energy. Here’s how you can do it:

Step 1: Convert Milliwatt-Hours to Watt-Hours

Since 1 milliwatt (mW) is 1/1000 of a watt (W), you can convert milliwatt-hours to watt-hours by dividing by 1000.

1 mWh=1×10−3 Wh1 \text{ mWh} = 1 \times 10^{-3} \text{ Wh}

Step 2: Convert Watt-Hours to Joules

Next, convert watt-hours to joules. There are 3600 seconds in an hour. Since 1 watt is 1 joule per second (J/s):

1 Wh=3600 J1 \text{ Wh} = 3600 \text{ J}

So,

1 mWh=1×10−3 Wh×3600 J/Wh=3.6 J1 \text{ mWh} = 1 \times 10^{-3} \text{ Wh} \times 3600 \text{ J/Wh} = 3.6 \text{ J}

Step 3: Convert Joules to Megajoules

Finally, convert joules to megajoules. Since 1 megajoule (MJ) is 10610^6 joules:

1 MJ=106 J1 \text{ MJ} = 10^6 \text{ J}

So,

3.6 J=3.6×10−6 MJ3.6 \text{ J} = 3.6 \times 10^{-6} \text{ MJ}

Hence,

1 mWh=3.6×10−6 MJ1 \text{ mWh} = 3.6 \times 10^{-6} \text{ MJ}

Real-World Examples of Milliwatt-Hours

To put this into perspective, here are a few examples using other quantities of milliwatt-hours:

1. A Small Electronic Device

If an electronic device, such as a smartwatch, consumes about 10 mWh of energy:

10 mWh=10×3.6×10−6 MJ=36×10−6 MJ=0.036 MJ10 \text{ mWh} = 10 \times 3.6 \times 10^{-6} \text{ MJ} = 36 \times 10^{-6} \text{ MJ} = 0.036 \text{ MJ}

2. A Small Battery

A small coin cell battery, like a CR2032, might have a capacity around 225 mWh:

225 mWh=225×3.6×10−6 MJ=810×10−6 MJ=0.81 MJ225 \text{ mWh} = 225 \times 3.6 \times 10^{-6} \text{ MJ} = 810 \times 10^{-6} \text{ MJ} = 0.81 \text{ MJ}

3. Larger Device Battery

A smartphone battery might be around 15,000 mWh (15 Wh):

15,000 mWh=15,000×3.6×10−6 MJ=54,000×10−6 MJ=0.054 MJ15,000 \text{ mWh} = 15,000 \times 3.6 \times 10^{-6} \text{ MJ} = 54,000 \times 10^{-6} \text{ MJ} = 0.054 \text{ MJ}

Summary of Conversion

  • 1 mWh = 3.6 × 10⁻⁶ MJ
  • Other values can similarly be converted by multiplying the number of milliwatt-hours by 3.6 and then converting from ×10−6 MJ\times 10^{-6} \text{ MJ}.

I hope this helps make the conversion process and real-world context clear!

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 Megajoules to other unit conversions.

What is milliwatt-hours?

A Milliwatt-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 m, metric prefix, for 0.001 or 10−310^{-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 10−310^{-3} is representing Milli prefix in mWh unit.

1mWh=10−3∗Pt=10−3∗IVt=3600∗10−3∗J=2.247∗1022∗10−3eV=8.598∗105∗10−3cal1 mWh = 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

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.

Complete Milliwatt-hours conversion table

Enter # of Milliwatt-hours
Convert 1 mWh to other unitsResult
Milliwatt-hours to Watt-seconds (mWh to Ws)3.6
Milliwatt-hours to Watt-minutes (mWh to Wm)0.06
Milliwatt-hours to Watt-hours (mWh to Wh)0.001
Milliwatt-hours to Kilowatt-hours (mWh to kWh)0.000001
Milliwatt-hours to Megawatt-hours (mWh to MWh)1e-9
Milliwatt-hours to Gigawatt-hours (mWh to GWh)1e-12
Milliwatt-hours to Joules (mWh to J)3.6
Milliwatt-hours to Kilojoules (mWh to kJ)0.0036
Milliwatt-hours to Megajoules (mWh to MJ)0.0000036
Milliwatt-hours to Gigajoules (mWh to GJ)3.6e-9
Milliwatt-hours to calories (mWh to cal)0.8604206500956
Milliwatt-hours to Kilocalories (mWh to kcal)0.0008604206500956

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