Terajoule is 1000000000000 joule units.
Terajoules to Gigajoules Converter — TJ to GJ
Convert Terajoule (TJ) to Gigajoule (GJ) using the exact conversion factor (1 terajoule = 1,000 gigajoule). See the formula, worked examples, and conversion table.
Terajoules to Gigajoules 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.
Gigajoule is 1000000000 joule units.
Result = input x 1e+12 / 1e+9.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Terajoules to Gigajoules
Terajoule and Gigajoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Terajoule is 1000000000000 joule units, and gigajoule is 1000000000 joule units.
Formula
gigajoules = terajoules × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 terajoule equals 1e+12 base units, and 1 gigajoule equals 1000000000 base units, so dividing one by the other gives the direct terajoule-to-gigajoule factor of 1000.
Simple example
1 TJ × 1000 = 1,000 GJ
1 terajoule = 1,000 gigajoules.
Real-world example
100 TJ × 1000 = 100,000 GJ
100 terajoules = 100,000 gigajoules.
Conversion table
| Terajoule (TJ) | Gigajoule (GJ) |
|---|---|
| 1 TJ | 1,000 GJ |
| 10 TJ | 10,000 GJ |
| 100 TJ | 100,000 GJ |
| 500 TJ | 500,000 GJ |
| 1,000 TJ | 1,000,000 GJ |
| 2,000 TJ | 2,000,000 GJ |
Reverse conversion: Gigajoule to Terajoule
1 GJ × 0.001 = 0.001 TJ
1 gigajoule = 0.001 terajoules.
terajoules = gigajoules × 0.001
For a page dedicated to this direction, see Gigajoule to Terajoule.
Understanding the Terajoule (TJ)
Terajoule is 1000000000000 joule units.
Understanding the Gigajoule (GJ)
Gigajoule is 1000000000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigajoules are in 1 terajoule?
1 terajoule equals 1,000 gigajoules, using the exact defined conversion factor rather than an estimate.
How do I convert terajoule to gigajoule?
Multiply the terajoule value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert gigajoule back to terajoule?
Use the reverse factor: 1 gigajoule equals 0.001 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 energy.
What is a gigajoule?
Gigajoule (GJ) is a unit of energy.
Is the terajoule to gigajoule conversion exact?
Yes. Both terajoule and gigajoule are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.