ENERGY
Energy & work
Mechanical, electrical, thermal and particle energy.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result0.001 kJ1 J = 0.001 kJ
EVERYDAY · ENGINEERING · SCIENCE
J to kJ Converter
Convert joule (J) to kilojoule (kJ). Enter a value for an instant result, or use the examples and reverse conversion below.
520units ready to convert
HOW IT IS CALCULATED
Convert through joule
Enter a joule value to calculate kilojoule with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| ergfrom J | erg | 10000000 |
| microjoulefrom J | µJ | 1000000 |
| millijoulefrom J | mJ | 1000 |
| joulefrom J | J | 1 |
| kilojoulefrom J | kJ | 0.001 |
| megajoulefrom J | MJ | 0.000001 |
| gigajoulefrom J | GJ | 0.000000001 |
| watt-hourfrom J | Wh | 0.000277778 |
| kilowatt-hourfrom J | kWh | 0.000000277778 |
| megawatt-hourfrom J | MWh | 2.77778e-10 |
| thermochemical caloriefrom J | calₜₕ | 0.239006 |
| thermochemical kilocaloriefrom J | kcalₜₕ | 0.000239006 |
| International Table caloriefrom J | calIT | 0.238846 |
| International Table British thermal unitfrom J | BtuIT | 0.000947817 |
| U.S. thermfrom J | therm US | 0.00000000948043 |
| foot pound-forcefrom J | ft·lbf | 0.737562 |
| electronvoltfrom J | eV | 6.24151e18 |
| kiloelectronvoltfrom J | keV | 6.24151e15 |
| megaelectronvoltfrom J | MeV | 6241510000000 |
| gigaelectronvoltfrom J | GeV | 6241510000 |
| ton of TNTfrom J | t TNT | 2.39006e-10 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
J to kJ Conversion Reference
Joule (J) and kilojoule (kJ) are units of energy & work. Use this page to convert in either direction.
Conversion Examples
| Joule (J) | Kilojoule (kJ) |
|---|---|
| 1 J | 0.001 kJ |
| 5 J | 0.005 kJ |
| 10 J | 0.01 kJ |
| 100 J | 0.1 kJ |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
Related Energy & work Conversions
J to erg (joule to erg)J to µJ (joule to microjoule)J to mJ (joule to millijoule)J to MJ (joule to megajoule)J to GJ (joule to gigajoule)J to Wh (joule to watt-hour)J to kWh (joule to kilowatt-hour)J to MWh (joule to megawatt-hour)J to calₜₕ (joule to thermochemical calorie)J to kcalₜₕ (joule to thermochemical kilocalorie)J to calIT (joule to International Table calorie)J to BtuIT (joule to International Table British thermal unit)J to therm US (joule to U.S. therm)J to ft·lbf (joule to foot pound-force)J to eV (joule to electronvolt)J to keV (joule to kiloelectronvolt)J to MeV (joule to megaelectronvolt)J to GeV (joule to gigaelectronvolt)J to t TNT (joule to ton of TNT)