Gigajoule to Joule Converter
Energy · unit-converter
Convert Gigajoule to Joule 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: Gigajoule (gj)
To: Joule (j)
About Gigajoule
One gigajoule is 1,000,000,000 J. Utility-scale and fuel-system reporting commonly use GJ.
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
How to convert gigajoules to joules
1 gigajoule is equal to 1.00000000e+9 joule when both are expressed in joule-equivalents:
1 gj = (1,000,000,000 J ÷ 1 J) j = 1.00000000e+9 j
SI prefix: 1 GJ = 1,000,000,000 J.
Each gigajoule is defined as 1,000,000,000 J and each joule as 1 J in this tool, so one gj equals 1,000,000,000 ÷ 1 j = 1.00000000e+9 j.
Let d(gj) be the numeric amount in Gigajoule (gj), and d(j) the amount in Joule (j). Then:
d(j) = d(gj) × (1,000,000,000 / 1)
Equivalently, divide by how many gj fit into one j (joules per j divided by joules per gj):
d(j) = d(gj) ÷ 1.00000000e-9
Or: joule = gigajoule ÷ 1.00000000e-9
Examples
Example #1: Convert 1 gj to joule
1 gj = 1 gj × (1,000,000,000/1) j = 1000000000 j
1 gj = 1 gj ÷ 1.00000000e-9 = 1000000000 j
Example #2: Convert 10 gj to joule
10 gj = 10 gj × (1,000,000,000/1) j = 10000000000 j
10 gj = 10 gj ÷ 1.00000000e-9 = 10000000000 j
Summary
To convert Gigajoule to Joule, multiply the value in gj by the ratio of joules per gj divided by joules per j. Equivalently: value_j = value_gj × (1000000000 / 1). Numerically, 1 gj equals 1000000000 j.
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 Gigajoule to Joule is 1.000000e+9 (1 gj = 1000000000 j).
Conversion tables
| Gigajoule (gj) | Joule (j) |
|---|---|
| 0.1 | 100,000,000 |
| 1 | 1,000,000,000 |
| 2 | 2,000,000,000 |
| 3 | 3,000,000,000 |
| 4 | 4,000,000,000 |
| 5 | 5,000,000,000 |
| 6 | 6,000,000,000 |
| 7 | 7,000,000,000 |
| 8 | 8,000,000,000 |
| 9 | 9,000,000,000 |
| Gigajoule (gj) | Joule (j) |
|---|---|
| 10 | 10,000,000,000 |
| 20 | 20,000,000,000 |
| 30 | 30,000,000,000 |
| 40 | 40,000,000,000 |
| 50 | 50,000,000,000 |
| 60 | 60,000,000,000 |
| 70 | 70,000,000,000 |
| 80 | 80,000,000,000 |
| 90 | 90,000,000,000 |
| 100 | 100,000,000,000 |