Joule to Gigajoule Converter
Energy · unit-converter
Convert Joule to Gigajoule with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Joule (j)
To: Gigajoule (gj)
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
About Gigajoule
One gigajoule is 1,000,000,000 J. Utility-scale and fuel-system reporting commonly use GJ.
How to convert joules to gigajoules
1 joule is equal to 1.00000000e-9 gigajoule when both are expressed in joule-equivalents:
1 j = (1 J ÷ 1,000,000,000 J) gj = 1.00000000e-9 gj
Each joule is defined as 1 J and each gigajoule as 1,000,000,000 J in this tool, so one j equals 1 ÷ 1,000,000,000 gj = 1.00000000e-9 gj.
Let d(j) be the numeric amount in Joule (j), and d(gj) the amount in Gigajoule (gj). Then:
d(gj) = d(j) × (1 / 1,000,000,000)
Equivalently, divide by how many j fit into one gj (joules per gj divided by joules per j):
d(gj) = d(j) ÷ 1.00000000e+9
Or: gigajoule = joule ÷ 1.00000000e+9
Examples
Example #1: Convert 1 j to gigajoule
1 j = 1 j × (1/1,000,000,000) gj = 0.000000001 gj
1 j = 1 j ÷ 1.00000000e+9 = 0.000000001 gj
Example #2: Convert 10 j to gigajoule
10 j = 10 j × (1/1,000,000,000) gj = 0.00000001 gj
10 j = 10 j ÷ 1.00000000e+9 = 0.00000001 gj
Summary
To convert Joule to Gigajoule, multiply the value in j by the ratio of joules per j divided by joules per gj. Equivalently: value_gj = value_j × (1 / 1000000000). Numerically, 1 j equals 1e-9 gj.
Relationship context
Both units are SI energy (joules). Conversions use fixed joule factors, so results stay consistent with the definitions in this converter. The factor from Joule to Gigajoule is 1.000000e-9 (1 j = 1e-9 gj).
Conversion tables
| Joule (j) | Gigajoule (gj) |
|---|---|
| 0.1 | 0.0000000001 |
| 1 | 0.000000001 |
| 2 | 0.000000002 |
| 3 | 0.000000003 |
| 4 | 0.000000004 |
| 5 | 0.000000005 |
| 6 | 0.000000006 |
| 7 | 0.000000007 |
| 8 | 0.000000008 |
| 9 | 0.000000009 |
| Joule (j) | Gigajoule (gj) |
|---|---|
| 10 | 0.00000001 |
| 20 | 0.00000002 |
| 30 | 0.00000003 |
| 40 | 0.00000004 |
| 50 | 0.00000005 |
| 60 | 0.00000006 |
| 70 | 0.00000007 |
| 80 | 0.00000008 |
| 90 | 0.00000009 |
| 100 | 0.0000001 |