Convert Joule to Kilojoule

Simple, fast and user-friendly online tool to convert Joule to Kilojoule ( J to kJ ) vice-versa and other Energy related units. Learn and share how to convert Joule to Kilojoule ( J to kJ ). Click to expand short unit definition.

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   Joule (J) =    Kilojoule (kJ)
Joule Conversion Table
Joule(J) to Joule (J) = 1 Joule (J)
Joule(J) to Kilojoule (kJ) = 1 Kilojoule (kJ)
Joule(J) to Calorie (cal) = 1 Calorie (cal)
Joule(J) to Kilocalorie (kcal) = 1 Kilocalorie (kcal)
Joule(J) to KilowattHour (kWh) = 1 KilowattHour (kWh)
Joule(J) to British thermal unit (BTU) = 1 British thermal unit (BTU)
Joule(J) to Erg (erg) = 1 Erg (erg)
Joule(J) to Foot pound (ft-lb) = 1 Foot pound (ft-lb)
Joule(J) to Electron volt (eV) = 1 Electron volt (eV)
Joule(J) to Decielectron volt (deV) = 1 Decielectron volt (deV)
Joule(J) to Centielectron volt (ceV) = 1 Centielectron volt (ceV)
Joule(J) to Millielectron volt (meV) = 1 Millielectron volt (meV)
Joule(J) to Microelectron volt (µeV) = 1 Microelectron volt (µeV)
Joule(J) to Nanoelectron volt (neV) = 1 Nanoelectron volt (neV)
Joule(J) to Picoelectron volt (peV) = 1 Picoelectron volt (peV)
Joule(J) to Femtoelectron volt (feV) = 1 Femtoelectron volt (feV)
Joule(J) to Attoelectron volt (aV) = 1 Attoelectron volt (aV)
Joule(J) to Zeptoelectron volt (zeV) = 1 Zeptoelectron volt (zeV)
Joule(J) to Yoctoelectron volt (yV) = 1 Yoctoelectron volt (yV)
Joule(J) to Decaelectron volt (daV) = 1 Decaelectron volt (daV)
Joule(J) to Hectoelectron volt (heV) = 1 Hectoelectron volt (heV)
Joule(J) to Kiloelectron volt (KeV) = 1 Kiloelectron volt (KeV)
Joule(J) to Megaelectron volt (MeV) = 1 Megaelectron volt (MeV)
Joule(J) to Gigaelectron volt (GeV) = 1 Gigaelectron volt (GeV)
Joule(J) to Teraelectron volt (TeV) = 1 Teraelectron volt (TeV)
Joule(J) to Petaelectron volt (PeV) = 1 Petaelectron volt (PeV)
Joule(J) to Exaelectron volt (EeV) = 1 Exaelectron volt (EeV)
Joule(J) to Zettaelectron volt (zeV) = 1 Zettaelectron volt (zeV)
Joule(J) to Yottaelectron volt (YeV) = 1 Yottaelectron volt (YeV)

What is Joule ?

A Joule (J) is a unit of energy in the International System of Units (SI). It helps us measure the amount of energy used or work done in various situations, from moving objects to heating things up or running electrical devices.

Understanding Joules in Simple Terms:
  1. Mechanical Work:

    • Imagine pushing a toy car across the floor. If you apply a force of one newton (which is a small amount of force) to move the car one meter in the same direction, you’ve done one joule of work. This means you’ve transferred one joule of energy from you to the car to get it moving.
  2. Heat Energy:

    • Think about heating water on a stove. The energy needed to raise the temperature of a small amount of water by one degree Celsius is measured in joules. For example, to heat one gram of water by one degree Celsius, it takes about 4.18 joules of energy.
  3. Electrical Energy:

    • Consider a lightbulb. If it uses one watt of power (which is a small amount) for one second, it uses one joule of electrical energy. So, a joule can tell us how much energy is being used to keep a device running.
Everyday Examples:
  • Lifting a Book: If you lift a book weighing about 100 grams to a height of one meter, you’re doing roughly one joule of work.
  • Apple Falling: When an apple falls from a table to the ground, the energy involved in that fall can be measured in joules.
Key Points:
  • Energy Transfer: A joule measures the transfer of energy from one place to another.
  • Different Forms: Whether it’s mechanical (moving things), thermal (heating things), or electrical (powering devices), the joule is the unit used to quantify energy.

In summary, a joule is a versatile unit that helps us understand how much energy is involved in various activities and processes, making it a fundamental concept in science and everyday life.




What is Kilojoule ?

A Kilojoule (kJ) is a unit of energy, similar to a joule, but larger. The prefix "kilo-" means a thousand, so one kilojoule is equal to 1,000 joules. It’s a way to measure larger amounts of energy that might be too big to express in just joules.

Understanding Kilojoules in Simple Terms:
  1. Energy in Food:

    • When you eat food, your body gets energy, which is often measured in kilojoules. For example, a banana might give you about 400 kilojoules of energy. This energy is what your body uses to do everything from thinking and moving to staying warm.
  2. Mechanical Work:

    • Imagine you have a machine that does work, like lifting heavy boxes. If it does 1,000 joules of work, that’s the same as doing 1 kilojoule of work. So, kilojoules help express energy in larger quantities when the tasks involve more energy.
  3. Electrical Energy:

    • In electricity, kilojoules can be used to measure the energy consumption of devices over time. For example, if a device uses 1,000 watts (or 1 kilowatt) for one second, it has used 1 kilojoule of energy.
Everyday Examples:
  • Exercise: When you exercise, your body burns energy, which can be measured in kilojoules. For instance, running for a few minutes might burn a few hundred kilojoules.
  • Boiling Water: Boiling a liter of water on the stove requires about 300 kilojoules of energy.
Key Points:
  • Larger Scale: Kilojoules are used when dealing with larger amounts of energy, making them more convenient than using thousands of joules.
  • Energy in Life: They help us understand the energy content in food, the work done by machines, and the energy used by electrical devices.

In summary, a kilojoule is a larger unit of energy that makes it easier to talk about and measure significant amounts of energy, whether it's in the food we eat, the work we do, or the electricity we use.



List of Energy conversion units
Joule Kilojoule Calorie Kilocalorie KilowattHour British thermal unit Erg Foot pound Electron volt Decielectron volt Centielectron volt Millielectron volt Microelectron volt Nanoelectron volt Picoelectron volt Femtoelectron volt Attoelectron volt Zeptoelectron volt Yoctoelectron volt Decaelectron volt Hectoelectron volt Kiloelectron volt Megaelectron volt Gigaelectron volt Teraelectron volt Petaelectron volt Exaelectron volt Zettaelectron volt Yottaelectron volt