Terajoule is 1000000000000 joule units.
Terajoules to Kilojoules Converter — TJ to kJ
Convert Terajoule (TJ) to Kilojoule (kJ) using the exact conversion factor (1 terajoule = 1,000,000,000 kilojoule). See the formula, worked examples, and conversion table.
Terajoules to Kilojoules converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Kilojoule is 1000 joule units.
Result = input x 1e+12 / 1000.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Terajoules to Kilojoules
Terajoule and Kilojoule both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Terajoule is 1000000000000 joule units, and kilojoule is 1000 joule units.
Formula
kilojoules = terajoules × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 terajoule equals 1e+12 base units, and 1 kilojoule equals 1000 base units, so dividing one by the other gives the direct terajoule-to-kilojoule factor of 1000000000.
Simple example
1 TJ × 1000000000 = 1,000,000,000 kJ
1 terajoule = 1,000,000,000 kilojoules.
Real-world example
100 TJ × 1000000000 = 100,000,000,000 kJ
100 terajoules = 100,000,000,000 kilojoules.
Conversion table
| Terajoule (TJ) | Kilojoule (kJ) |
|---|---|
| 1 TJ | 1,000,000,000 kJ |
| 10 TJ | 10,000,000,000 kJ |
| 50 TJ | 50,000,000,000 kJ |
| 100 TJ | 100,000,000,000 kJ |
| 500 TJ | 500,000,000,000 kJ |
| 1,000 TJ | 1e+12 kJ |
Reverse conversion: Kilojoule to Terajoule
1 kJ × 1e-9 = 1e-9 TJ
1 kilojoule = 1e-9 terajoules.
terajoules = kilojoules × 1e-9
For a page dedicated to this direction, see Kilojoule to Terajoule.
Understanding the Terajoule (TJ)
Terajoule is 1000000000000 joule units.
Understanding the Kilojoule (kJ)
Kilojoule is 1000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilojoules are in 1 terajoule?
1 terajoule equals 1,000,000,000 kilojoules, using the exact defined conversion factor rather than an estimate.
How do I convert terajoule to kilojoule?
Multiply the terajoule value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert kilojoule back to terajoule?
Use the reverse factor: 1 kilojoule equals 1e-9 terajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a terajoule?
Terajoule (TJ) is a unit of engineering.
What is a kilojoule?
Kilojoule (kJ) is a unit of engineering.
Is the terajoule to kilojoule conversion exact?
Yes. Both terajoule and kilojoule are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.