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Kilowatt-hours to Kilojoules conversion

Kilowatt-hours to Kilojoules conversion table

Kilowatt-hours (kWh)Kilojoules (kJ)
00
13600
27200
310800
414400
518000
621600
725200
828800
932400
1036000
2072000
30108000
40144000
50180000
60216000
70252000
80288000
90324000
100360000
10003600000

How to convert kilowatt-hours to kilojoules?

Sure! A kilowatt-hour (kWh) is a unit of energy that represents the amount of energy used if an appliance with a power rating of one kilowatt operates for one hour. To convert kilowatt-hours to kilojoules, you need to use the following relationship: 1 kWh=3,600 kJ1 \text{ kWh} = 3,600 \text{ kJ}

This conversion factor is derived from the definitions of the units:

  • 1 kilowatt (kW) = 1,000 watts (W)
  • 1 watt (W) = 1 joule per second (J/s)
  • 1 hour (h) = 3,600 seconds (s)

So, 1 kilowatt-hour is: 1 kWh=1,000 W×3,600 s1 \text{ kWh} = 1,000 \text{ W} \times 3,600 \text{ s} 1 kWh=3,600,000 J1 \text{ kWh} = 3,600,000 \text{ J} 1 kWh=3,600 kJ1 \text{ kWh} = 3,600 \text{ kJ}

Examples of Other Quantities

  1. 2 kWh to kilojoules: 2 kWh×3,600 kJ/kWh=7,200 kJ2 \text{ kWh} \times 3,600 \text{ kJ/kWh} = 7,200 \text{ kJ}

  2. 0.5 kWh to kilojoules: 0.5 kWh×3,600 kJ/kWh=1,800 kJ0.5 \text{ kWh} \times 3,600 \text{ kJ/kWh} = 1,800 \text{ kJ}

  3. 10 kWh to kilojoules: 10 kWh×3,600 kJ/kWh=36,000 kJ10 \text{ kWh} \times 3,600 \text{ kJ/kWh} = 36,000 \text{ kJ}

Real-World Examples

  • Suppose you have a 1000-watt microwave. Using it for 1 hour would consume 1 kWh or 3,600 kJ.
  • A typical electric car might use around 30 kWh to travel 100 miles. This translates to: 30 kWh×3,600 kJ/kWh=108,000 kJ30 \text{ kWh} \times 3,600 \text{ kJ/kWh} = 108,000 \text{ kJ}
  • A household may consume about 900 kWh in a month. This is equal to: 900 kWh×3,600 kJ/kWh=3,240,000 kJ900 \text{ kWh} \times 3,600 \text{ kJ/kWh} = 3,240,000 \text{ kJ}

These conversions help to put the energy consumption of various appliances and systems into perspective, making it easier to understand and compare their energy usage.

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 Kilojoules to other unit conversions.

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

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.

Complete Kilowatt-hours conversion table

Enter # of Kilowatt-hours
Convert 1 kWh to other unitsResult
Kilowatt-hours to Watt-seconds (kWh to Ws)3600000
Kilowatt-hours to Watt-minutes (kWh to Wm)60000
Kilowatt-hours to Watt-hours (kWh to Wh)1000
Kilowatt-hours to Milliwatt-hours (kWh to mWh)1000000
Kilowatt-hours to Megawatt-hours (kWh to MWh)0.001
Kilowatt-hours to Gigawatt-hours (kWh to GWh)0.000001
Kilowatt-hours to Joules (kWh to J)3600000
Kilowatt-hours to Kilojoules (kWh to kJ)3600
Kilowatt-hours to Megajoules (kWh to MJ)3.6
Kilowatt-hours to Gigajoules (kWh to GJ)0.0036
Kilowatt-hours to calories (kWh to cal)860420.6500956
Kilowatt-hours to Kilocalories (kWh to kcal)860.4206500956

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