Kilojoule is 1000 joule units.
Kilojoules to Nanojoules Converter — kJ to nJ
Convert Kilojoule (kJ) to Nanojoule (nJ) using the exact conversion factor (1 kilojoule = 1,000,000,000,000 nanojoule). See the formula, worked examples, and conversion table.
Kilojoules to Nanojoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Nanojoule is 1e-9 joule units.
Result = input x 1000 / 1e-9.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilojoules to Nanojoules
Kilojoule and Nanojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Kilojoule is 1000 joule units, and nanojoule is 1e-9 joule units.
Formula
nanojoules = kilojoules × 1000000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 kilojoule equals 1000 base units, and 1 nanojoule equals 1e-9 base units, so dividing one by the other gives the direct kilojoule-to-nanojoule factor of 1000000000000.
Simple example
1 kJ × 1000000000000 = 1,000,000,000,000 nJ
1 kilojoule = 1,000,000,000,000 nanojoules.
Real-world example
100 kJ × 1000000000000 = 1e+14 nJ
100 kilojoules = 1e+14 nanojoules.
Conversion table
| Kilojoule (kJ) | Nanojoule (nJ) |
|---|---|
| 1 kJ | 1,000,000,000,000 nJ |
| 10 kJ | 1e+13 nJ |
| 100 kJ | 1e+14 nJ |
| 500 kJ | 5e+14 nJ |
| 1,000 kJ | 1e+15 nJ |
| 2,000 kJ | 2e+15 nJ |
Reverse conversion: Nanojoule to Kilojoule
1 nJ × 1e-12 = 1e-12 kJ
1 nanojoule = 1e-12 kilojoules.
kilojoules = nanojoules × 1e-12
For a page dedicated to this direction, see Nanojoule to Kilojoule.
Understanding the Kilojoule (kJ)
Kilojoule is 1000 joule units.
Understanding the Nanojoule (nJ)
Nanojoule is 1e-9 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanojoules are in 1 kilojoule?
1 kilojoule equals 1,000,000,000,000 nanojoules, using the exact defined conversion factor rather than an estimate.
How do I convert kilojoule to nanojoule?
Multiply the kilojoule value by 1000000000000. The converter above does this instantly to whatever precision you set.
How do I convert nanojoule back to kilojoule?
Use the reverse factor: 1 nanojoule equals 1e-12 kilojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilojoule?
Kilojoule (kJ) is a unit of energy.
What is a nanojoule?
Nanojoule (nJ) is a unit of energy.
Is the kilojoule to nanojoule conversion exact?
Yes. Both kilojoule and nanojoule are defined by fixed standards rather than physical artifacts, so the factor of 1000000000000 used above is exact to as many digits as you choose to display.