Gigajoules: conversions & definition
Gigajoules (GJ) represent energy. One unit equals 10^9 J. One joule is one newton-meter of work or one watt-second of energy.
Choose the unit you need
Each row converts one GJ. Open a converter to enter any value and see its formula, worked example and reference table. Results below are rounded to 10 significant digits.
| Convert to | Equivalent value | Calculator |
|---|---|---|
| Joules (J) | ≈ 1,000,000,000 | Convert GJ to J |
| Millijoules (mJ) | ≈ 1e+12 | Convert GJ to mJ |
| Kilojoules (kJ) | ≈ 1,000,000 | Convert GJ to kJ |
| Microjoules (µJ) | ≈ 1e+15 | Convert GJ to µJ |
| Megajoules (MJ) | ≈ 1,000 | Convert GJ to MJ |
| Nanojoules (nJ) | ≈ 1e+18 | Convert GJ to nJ |
| Centijoules (cJ) | ≈ 100,000,000,000 | Convert GJ to cJ |
| Decijoules (dJ) | ≈ 10,000,000,000 | Convert GJ to dJ |
| Hectojoules (hJ) | ≈ 10,000,000 | Convert GJ to hJ |
| Decajoules (daJ) | ≈ 100,000,000 | Convert GJ to daJ |
| Picojoules (pJ) | ≈ 1e+21 | Convert GJ to pJ |
| Terajoules (TJ) | ≈ 0.001 | Convert GJ to TJ |
| Femtojoules (fJ) | ≈ 1e+24 | Convert GJ to fJ |
| Petajoules (PJ) | ≈ 0.000001 | Convert GJ to PJ |
| Attojoules (aJ) | ≈ 1e+27 | Convert GJ to aJ |
| Exajoules (EJ) | ≈ 1e-9 | Convert GJ to EJ |
| Zeptojoules (zJ) | ≈ 1e+30 | Convert GJ to zJ |
| Zettajoules (ZJ) | ≈ 1e-12 | Convert GJ to ZJ |
| Yoctojoules (yJ) | ≈ 1e+33 | Convert GJ to yJ |
| Yottajoules (YJ) | ≈ 1e-15 | Convert GJ to YJ |
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