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Power and Energy

GJtokJ

Convert gigajoules (GJ) to kilojoules (kJ).

Factor1 GJ = 1000000 kJ

Converter

GJ

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1.00000e+6kJ

Rendered to 6 significant figures.

Formula

Formula
kJ = GJ × 1000000

Multiply any value in gigajoules by 1000000 to obtain the value in kilojoules.

Worked example

Convert 1 GJ to kJ.

  1. 01Start with 1 GJ.
  2. 02Multiply by the conversion factor: 1 × 1000000 = 1.00000e+6 kJ.
Result1 GJ = 1.00000e+6 kJ

Conversion table

GJkJ
11.0000e+6
22.0000e+6
55.0000e+6
101e+7
202e+7
505e+7
1001e+8
2002e+8
5005e+8
10001e+9

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from GJ to kJ?
1 GJ equals 1000000 kJ. To convert, multiply the value in gigajoules by 1000000.
How do I convert 1 GJ to kJ?
1 GJ = 1.00000e+6 kJ. For any value, multiply by 1000000.
How do I convert kJ back to GJ?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 kJ = 1e-6 GJ.
When would I need to convert gigajoule to kilojoule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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