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Kilojoules (kJ) Unit Definition
The kilojoule is a multiple of the unit joule (J) for energy. The International System of Units (SI) defines the prefix kilo (k) as a factor of one thousand. Per this definition, one kilojoule is 1000 joules. The kilojoule is represented by the symbol kJ.
SI Multiples
A table of various energy joule units derived from SI multiples:
Submultiples |
Multiples |
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Scientific Notation |
Value |
Prefix |
Name |
Scientific Notation |
Value |
Prefix |
Name |
10-1 J |
0.1 J |
Deci (d) | Decijoules (dJ) | 101 J |
10 J |
Deca (da) | Decajoules (daJ) |
10-2 J |
0.01 J |
Centi (c) | Centijoules (cJ) | 102 J |
100 J |
Hecto (h) | Hectojoules (hJ) |
10-3 J |
0.001 J |
Milli (m) | Millijoules (mJ) | 103 J |
1000 J |
Kilo (k) | Kilojoules (kJ) |
10-6 J |
0.000001 J |
Micro (µ) | Microjoules (µJ) | 106 J |
1000000 J |
Mega (M) | Megajoules (MJ) |
10-9 J |
0.000000001 J |
Nano (n) | Nanojoules (nJ) | 109 J |
1000000000 J |
Giga (G) | Gigajoules (GJ) |
10-12 J |
0.000000000001 J |
Pico (p) | Picojoules (pJ) | 1012 J |
1000000000000 J |
Tera (T) | Terajoules (TJ) |
10-15 J |
0.000000000000001 J |
Femto (f) | Femtojoules (fJ) | 1015 J |
1000000000000000 J |
Peta (P) | Petajoules (PJ) |
10-18 J |
0.000000000000000001 J |
Atto (a) | Attojoules (aJ) | 1018 J |
1000000000000000000 J |
Exa (E) | Exajoules (EJ) |
10-21 J |
0.000000000000000000001 J |
Zepto (z) | Zeptojoules (zJ) | 1021 J |
1000000000000000000000 J |
Zetta (Z) | Zettajoules (ZJ) |
10-24 J |
0.000000000000000000000001 J |
Yocto (y) | Yoctojoules (yJ) | 1024 J |
1000000000000000000000000 J |
Yotta (Y) | Yottajoules (YJ) |
10-27 J |
0.000000000000000000000000001 J |
Ronto (r) | Rontojoules (rJ) | 1027 J |
1000000000000000000000000000 J |
Ronna (R) | Ronnajoules (RJ) |
10-30 J |
0.000000000000000000000000000001 J |
Quecto (q) | Quectojoules (qJ) | 1030 J |
1000000000000000000000000000000 J |
Quetta (Q) | Quettajoules (QJ) |
Other Energy Unit Definitions
- Attojoules (aJ)
Board of Trade Unit (BOTU)
British Thermal Units (BTU)
Btu Thermochemical (BTU)
Calorie 15°c (cal)
Calories I.T. (cal)
Calories Nutritional (cal)
Calories Thermochemical (cal)
Celsius Heat Unit (chu)
- Centijoules (cJ)
Cheval Vapeur Heure (cvh)
- Decajoules (daJ)
- Decijoules (dJ)
- Dekajoules (daJ)
Dekatherm (dth)
Dekawatt Hour (daW∙h)
Electronvolt (eV)
Ergs (erg)
- Exajoules (EJ)
Exawatt Hours (EW∙h)
- Femtojoules (fJ)
Foot Pound-Force (ft∙lbf)
Foot Poundals (ft∙pdl)
Gallon UK of Automotive Gasoline (gal)
Gallon UK of Aviation Gasoline (gal)
Gallon UK of Diesel Oil (gal)
Gallon UK of Distillate no. 2 Fuel Oil (gal)
Gallon UK of Kerosene (gal)
Gallon UK of Kerosene Type Jet Fuel (gal)
Gallon UK of LPG (gal)
Gallon UK of Naphtha Type Jet Fuel (gal)
Gallon UK of Residual Fuel Oil (gal)
Gallon USA of Automotive Gasoline (gal)
Gallon USA of Aviation Gasoline (gal)
Gallon USA of Diesel Oil (gal)
Gallon USA of Distillate no. 2 Fuel Oil (gal)
Gallon USA of Kerosene (gal)
Gallon USA of Kerosene Type Jet Fuel (gal)
Gallon USA of LPG (gal)
Gallon USA of Naphtha Type Jet Fuel (gal)
Gallon USA of Residual Fuel Oil (gal)
Gigacalories 15°C (Gcal)
Gigacalories I.T. (Gcal)
Gigaelectronvolt (GeV)
- Gigajoules (GJ)
Gigawatt Hour (GW∙h)
Gram Calorie (gcal)
Hartree (Eh)
- Hectojoules (hJ)
Hectowatt Hours (hW∙h)
Horsepower Hour (hp∙h)
Hundred Cubic Foot of Natural Gas (CCF)
Inch Ounce (in∙oz)
Inch Pound (in∙lb)
- Joules (J)
Kilocalories 15°C (kcal)
Kilocalories I.T. (kcal)
Kilocalories Thermochemical (kcal)
Kiloelectronvolt (keV)
Kilogram Calories (kcal)
Kilogram-Force Meter (kgf∙m)
- Kilojoules (kJ)
Kilopond Meters (kp∙m)
Kiloton Explosive (kt)
Kilowatt Hour (kW∙h)
Liter Atmosphere (l∙atm)
Megacalories 15°C (Mcal)
Megacalories I.T. (Mcal)
Megaelectronvolt (MeV)
- Megajoules (MJ)
Megalerg (Merg)
Megaton Explosive (Mt)
Megawatt Hour (MW∙h)
Meter Kilogram-Force (m∙kgf)
- Microjoules (μJ)
- Millijoules (mJ)
Myriawatt Hour (myW∙h)
- Nanojoules (nJ)
Newton Meter (N∙m)
- Petajoules (PJ)
Petawatthours (PW∙h)
Pferdestärkenstunde (hp∙h)
- Picojoules (pJ)
Q Units (q-units)
Quad (quad)
- Quectojoules (qJ)
- Quettajoules (QJ)
- Ronnajoules (RJ)
- Rontojoules (rJ)
Teraelectronvolt (TeV)
- Terajoules (TJ)
Terawatthour (TW∙h)
Therm Europe (thm)
Therm USA (thm)
Thermie (th)
Ton Explosive (t)
Tonne of Coal Equivalent (t)
Tonne of Oil Equivalent (t)
Watthour (W∙h)
Wattsecond (W∙s)
- Yoctojoules (yJ)
- Yottajoules (YJ)
Yottawatthour (YW∙h)
- Zeptojoules (zJ)
- Zettajoules (ZJ)
Zettawatthour (ZW∙h)
Convert to Another Frequency Unit
Related Definitions
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Sources
“Joule.” Wikipedia, Wikimedia Foundation, 4 Sept. 2023, en.wikipedia.org/wiki/Joule.