XConvert Other Unit ConvertersDownloads Compress MP4

Kilojoules to Milliwatt-hours conversion

Kilojoules to Milliwatt-hours conversion table

Kilojoules (kJ)	Milliwatt-hours (mWh)
0	0
1	277.77777777778
2	555.55555555556
3	833.33333333333
4	1111.1111111111
5	1388.8888888889
6	1666.6666666667
7	1944.4444444444
8	2222.2222222222
9	2500
10	2777.7777777778
20	5555.5555555556
30	8333.3333333333
40	11111.111111111
50	13888.888888889
60	16666.666666667
70	19444.444444444
80	22222.222222222
90	25000
100	27777.777777778
1000	277777.77777778

How to convert kilojoules to milliwatt-hours?

Certainly! Here's how you convert 1 kilojoule (kJ) to milliwatt-hours (mWh), followed by some real-world examples for other quantities of kilojoules.

Conversion Process

Understanding the Units:
- 1 kilojoule (kJ) = 1,000 joules (J)
- 1 watt-hour (Wh) = 3,600 joules (J)
- 1 milliwatt-hour (mWh) = 1/1,000 watt-hour (Wh)
Calculate the Conversion Factor:
- Since 1 Wh = 3,600 J, therefore: $1 mWh = \frac{1 Wh}{1,000} = \frac{3,600 J}{1,000} = 3.6 J$
Convert Kilojoules to Milliwatt-Hours:
- Given: 1 kJ = 1,000 J
- Use the conversion factor: $1,000 J \times \frac{1 mWh}{3.6 J} = \frac{1,000}{3.6} mWh \approx 277.78 mWh$

Therefore, 1 kilojoule (kJ) is approximately 277.78 milliwatt-hours (mWh).

Real-World Examples

Food Energy:
- A medium apple has about 60 kilojoules (kJ) of energy.
  - 60 kJ = 60,000 J
  - Convert to mWh: $60,000 J \times \frac{1 mWh}{3.6 J} \approx 16,666.67 mWh$
Daily Caloric Intake:
- An average daily caloric intake for an adult might be about 8,400 kJ.
  - 8,400 kJ = 8,400,000 J
  - Convert to mWh: $8,400,000 J \times \frac{1 mWh}{3.6 J} \approx 2,333,333.33 mWh$
Battery Energy:
- A typical AA battery stores around 9.36 kJ of energy.
  - 9.36 kJ = 9,360 J
  - Convert to mWh: $9,360 J \times \frac{1 mWh}{3.6 J} \approx 2,600 mWh$
Exercise:
- When running, a human might burn approximately 1,200 kJ per hour.
  - 1,200 kJ = 1,200,000 J
  - Convert to mWh: $1,200,000 J \times \frac{1 mWh}{3.6 J} \approx 333,333.33 mWh$

By using these examples, you can better understand how kilojoules (kJ) translate into real-world energy usage and how to convert those values into milliwatt-hours (mWh) for context.

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 Milliwatt-hours to other unit conversions.

What is kilojoules?

Kilojoules (kJ) are a unit of energy, specifically a measure of the amount of energy required to raise the temperature of 1 kilogram of water by 1 degree Celsius.

In other words, it's a way to quantify the amount of energy that something contains or releases. Kilojoules are commonly used in science, technology, and everyday life to express the energy content of various things, such as:

Foods: The energy content of foods is often listed in kilojoules (kJ) on nutrition labels.
Electrical appliances: The power consumption of devices like refrigerators or televisions is sometimes expressed in kilowatts (kW), which can be converted to kilojoules per second.
Chemical reactions: In chemistry, kilojoules are used to express the energy released or absorbed during chemical reactions.

To put it into perspective:

A typical snack bar might have around 400-600 kJ of energy content
A standard household light bulb uses about 60 W (which is equivalent to approximately 360 kJ per hour)
The kinetic energy of a human running at a moderate pace is around 500-700 kJ per minute

So, kilojoules are simply a way to measure and express the amount of energy in various forms.

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 $10^{-3}$ . 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 $10^{-3}$ is representing Milli prefix in mWh unit.

1 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

$P - Power$
$t - Time \text{ (in hours. Multiply by 3600 to convert to seconds)}$
$I - Current$ $V - Volts$
$J - Joules$
$eV - Electronvolt$
$cal - Calories$

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 Kilojoules conversion table

Enter # of Kilojoules

Convert 1 kJ to other units	Result
Kilojoules to Watt-seconds (kJ to Ws)	1000
Kilojoules to Watt-minutes (kJ to Wm)	16.666666666667
Kilojoules to Watt-hours (kJ to Wh)	0.2777777777778
Kilojoules to Milliwatt-hours (kJ to mWh)	277.77777777778
Kilojoules to Kilowatt-hours (kJ to kWh)	0.0002777777777778
Kilojoules to Megawatt-hours (kJ to MWh)	2.7777777777778e-7
Kilojoules to Gigawatt-hours (kJ to GWh)	2.7777777777778e-10
Kilojoules to Joules (kJ to J)	1000
Kilojoules to Megajoules (kJ to MJ)	0.001
Kilojoules to Gigajoules (kJ to GJ)	0.000001
Kilojoules to calories (kJ to cal)	239.00573613767
Kilojoules to Kilocalories (kJ to kcal)	0.2390057361377

Kilojoules to Milliwatt-hours conversion