Gigajoule is 1000000000 joule units.
Gigajoules to Decijoules Converter — GJ to dJ
Convert Gigajoule (GJ) to Decijoule (dJ) using the exact conversion factor (1 gigajoule = 10,000,000,000 decijoule). See the formula, worked examples, and conversion table.
Gigajoules to Decijoules 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.
Decijoule is 0.1 joule units.
Result = input x 1e+9 / 0.1.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gigajoules to Decijoules
Gigajoule and Decijoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Gigajoule is 1000000000 joule units, and decijoule is 0.1 joule units.
Formula
decijoules = gigajoules × 10000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 gigajoule equals 1000000000 base units, and 1 decijoule equals 0.1 base units, so dividing one by the other gives the direct gigajoule-to-decijoule factor of 10000000000.
Simple example
1 GJ × 10000000000 = 10,000,000,000 dJ
1 gigajoule = 10,000,000,000 decijoules.
Real-world example
100 GJ × 10000000000 = 1e+12 dJ
100 gigajoules = 1e+12 decijoules.
Conversion table
| Gigajoule (GJ) | Decijoule (dJ) |
|---|---|
| 1 GJ | 10,000,000,000 dJ |
| 10 GJ | 100,000,000,000 dJ |
| 100 GJ | 1e+12 dJ |
| 500 GJ | 5e+12 dJ |
| 1,000 GJ | 1e+13 dJ |
| 2,000 GJ | 2e+13 dJ |
Reverse conversion: Decijoule to Gigajoule
1 dJ × 1e-10 = 1e-10 GJ
1 decijoule = 1e-10 gigajoules.
gigajoules = decijoules × 1e-10
For a page dedicated to this direction, see Decijoule to Gigajoule.
Understanding the Gigajoule (GJ)
Gigajoule is 1000000000 joule units.
Understanding the Decijoule (dJ)
Decijoule is 0.1 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decijoules are in 1 gigajoule?
1 gigajoule equals 10,000,000,000 decijoules, using the exact defined conversion factor rather than an estimate.
How do I convert gigajoule to decijoule?
Multiply the gigajoule value by 10000000000. The converter above does this instantly to whatever precision you set.
How do I convert decijoule back to gigajoule?
Use the reverse factor: 1 decijoule equals 1e-10 gigajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a gigajoule?
Gigajoule (GJ) is a unit of energy.
What is a decijoule?
Decijoule (dJ) is a unit of energy.
Is the gigajoule to decijoule conversion exact?
Yes. Both gigajoule and decijoule are defined by fixed standards rather than physical artifacts, so the factor of 10000000000 used above is exact to as many digits as you choose to display.