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Power and Energy

WhtoGJ

Convert watt-hours (Wh) to gigajoules (GJ).

Factor1 Wh = 3.6e-6 GJ

Converter

Wh

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

Result
3.6GJ

Rendered to 6 significant figures.

Formula

Formula
GJ = Wh × 3.6e-6

Multiply any value in watt-hours by 3.6e-6 to obtain the value in gigajoules.

Worked example

Convert 1.00000e+6 Wh to GJ.

  1. 01Start with 1.00000e+6 Wh.
  2. 02Multiply by the conversion factor: 1.00000e+6 × 3.6e-6 = 3.6 GJ.
Result1.00000e+6 Wh = 3.6 GJ

Conversion table

WhGJ
13.6e-6
27.2e-6
51.8e-5
103.6e-5
207.2e-5
500.00018
1000.00036
2000.00072
5000.0018
10000.0036

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from Wh to GJ?
1 Wh equals 3.6e-6 GJ. To convert, multiply the value in watt-hours by 3.6e-6.
How do I convert 1 Wh to GJ?
1 Wh = 3.6e-6 GJ. For any value, multiply by 3.6e-6.
How do I convert GJ back to Wh?
Divide by the same factor — or equivalently, multiply by 277777.8. So 1 GJ = 277778 Wh.
When would I need to convert watt-hour to gigajoule?
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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