Gigajoule to Kilojoule Converter
Energy · unit-converter
Convert Gigajoule to Kilojoule 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: Kilojoule (kj)
About Gigajoule
One gigajoule is 1,000,000,000 J. Utility-scale and fuel-system reporting commonly use GJ.
About Kilojoule
One kilojoule is 1,000 J. Scientific and engineering contexts often use kJ alongside joules.
How to convert gigajoules to kilojoules
1 gigajoule is equal to 1000000 kilojoule when both are expressed in joule-equivalents:
1 gj = (1,000,000,000 J ÷ 1,000 J) kj = 1000000 kj
Each gigajoule is defined as 1,000,000,000 J and each kilojoule as 1,000 J in this tool, so one gj equals 1,000,000,000 ÷ 1,000 kj = 1000000 kj.
Let d(gj) be the numeric amount in Gigajoule (gj), and d(kj) the amount in Kilojoule (kj). Then:
d(kj) = d(gj) × (1,000,000,000 / 1,000)
Equivalently, divide by how many gj fit into one kj (joules per kj divided by joules per gj):
d(kj) = d(gj) ÷ 0.000001
Or: kilojoule = gigajoule ÷ 0.000001
Examples
Example #1: Convert 1 gj to kilojoule
1 gj = 1 gj × (1,000,000,000/1,000) kj = 1000000 kj
1 gj = 1 gj ÷ 0.000001 = 1000000 kj
Example #2: Convert 10 gj to kilojoule
10 gj = 10 gj × (1,000,000,000/1,000) kj = 10000000 kj
10 gj = 10 gj ÷ 0.000001 = 10000000 kj
Summary
To convert Gigajoule to Kilojoule, multiply the value in gj by the ratio of joules per gj divided by joules per kj. Equivalently: value_kj = value_gj × (1000000000 / 1000). Numerically, 1 gj equals 1000000 kj.
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 Kilojoule is 1.000000e+6 (1 gj = 1000000 kj).
Conversion tables
| Gigajoule (gj) | Kilojoule (kj) |
|---|---|
| 0.1 | 100,000 |
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 3 | 3,000,000 |
| 4 | 4,000,000 |
| 5 | 5,000,000 |
| 6 | 6,000,000 |
| 7 | 7,000,000 |
| 8 | 8,000,000 |
| 9 | 9,000,000 |
| Gigajoule (gj) | Kilojoule (kj) |
|---|---|
| 10 | 10,000,000 |
| 20 | 20,000,000 |
| 30 | 30,000,000 |
| 40 | 40,000,000 |
| 50 | 50,000,000 |
| 60 | 60,000,000 |
| 70 | 70,000,000 |
| 80 | 80,000,000 |
| 90 | 90,000,000 |
| 100 | 100,000,000 |