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Energy & work
Mechanical, electrical, thermal and particle energy.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result1000000 mJ1 kJ = 1000000 mJ
EVERYDAY · ENGINEERING · SCIENCE
kJ to mJ Converter
Convert kilojoule (kJ) to millijoule (mJ). 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 kilojoule value to calculate millijoule 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 kJ | erg | 10000000000 |
| microjoulefrom kJ | µJ | 1000000000 |
| millijoulefrom kJ | mJ | 1000000 |
| joulefrom kJ | J | 1000 |
| kilojoulefrom kJ | kJ | 1 |
| megajoulefrom kJ | MJ | 0.001 |
| gigajoulefrom kJ | GJ | 0.000001 |
| watt-hourfrom kJ | Wh | 0.277778 |
| kilowatt-hourfrom kJ | kWh | 0.000277778 |
| megawatt-hourfrom kJ | MWh | 0.000000277778 |
| thermochemical caloriefrom kJ | calₜₕ | 239.006 |
| thermochemical kilocaloriefrom kJ | kcalₜₕ | 0.239006 |
| International Table caloriefrom kJ | calIT | 238.846 |
| International Table British thermal unitfrom kJ | BtuIT | 0.947817 |
| U.S. thermfrom kJ | therm US | 0.00000948043 |
| foot pound-forcefrom kJ | ft·lbf | 737.562 |
| electronvoltfrom kJ | eV | 6.24151e21 |
| kiloelectronvoltfrom kJ | keV | 6.24151e18 |
| megaelectronvoltfrom kJ | MeV | 6.24151e15 |
| gigaelectronvoltfrom kJ | GeV | 6241510000000 |
| ton of TNTfrom kJ | t TNT | 0.000000239006 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
kJ to mJ Conversion Reference
Kilojoule (kJ) and millijoule (mJ) are units of energy & work. Use this page to convert in either direction.
Conversion Examples
| Kilojoule (kJ) | Millijoule (mJ) |
|---|---|
| 1 kJ | 1000000 mJ |
| 5 kJ | 5000000 mJ |
| 10 kJ | 10000000 mJ |
| 100 kJ | 100000000 mJ |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
mJ to kJ (millijoule to kilojoule)
Related Energy & work Conversions
kJ to erg (kilojoule to erg)kJ to µJ (kilojoule to microjoule)kJ to J (kilojoule to joule)kJ to MJ (kilojoule to megajoule)kJ to GJ (kilojoule to gigajoule)kJ to Wh (kilojoule to watt-hour)kJ to kWh (kilojoule to kilowatt-hour)kJ to MWh (kilojoule to megawatt-hour)kJ to calₜₕ (kilojoule to thermochemical calorie)kJ to kcalₜₕ (kilojoule to thermochemical kilocalorie)kJ to calIT (kilojoule to International Table calorie)kJ to BtuIT (kilojoule to International Table British thermal unit)kJ to therm US (kilojoule to U.S. therm)kJ to ft·lbf (kilojoule to foot pound-force)kJ to eV (kilojoule to electronvolt)kJ to keV (kilojoule to kiloelectronvolt)kJ to MeV (kilojoule to megaelectronvolt)kJ to GeV (kilojoule to gigaelectronvolt)kJ to t TNT (kilojoule to ton of TNT)