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Specific Properties

GJ/kgtokWh/kg

Convert gigajoules per kilogram (GJ/kg) to kilowatt-hours per kilogram (kWh/kg).

Factor1 GJ/kg = 277.7778 kWh/kg

Converter

GJ/kg

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

Result
277.778kWh/kg

Rendered to 6 significant figures.

Formula

Formula
kWh/kg = GJ/kg × 277.7778

Multiply any value in gigajoules per kilogram by 277.7778 to obtain the value in kilowatt-hours per kilogram.

Worked example

Convert 1 GJ/kg to kWh/kg.

  1. 01Start with 1 GJ/kg.
  2. 02Multiply by the conversion factor: 1 × 277.7778 = 277.778 kWh/kg.
Result1 GJ/kg = 277.778 kWh/kg

Conversion table

GJ/kgkWh/kg
1277.78
2555.56
51388.9
102777.8
205555.6
5013889
10027778
20055556
5001.3889e+5
10002.7778e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from GJ/kg to kWh/kg?
1 GJ/kg equals 277.7778 kWh/kg. To convert, multiply the value in gigajoules per kilogram by 277.7778.
How do I convert 1 GJ/kg to kWh/kg?
1 GJ/kg = 277.778 kWh/kg. For any value, multiply by 277.7778.
How do I convert kWh/kg back to GJ/kg?
Divide by the same factor — or equivalently, multiply by 0.0036. So 1 kWh/kg = 0.0036 GJ/kg.
When would I need to convert gigajoule per kilogram to kilowatt-hour per kilogram?
Specific-energy conversions between GJ/kg and kWh/kg are needed in fuel-property datasheets (HHV/LHV), thermodynamic state calculations, battery energy-density comparisons, and combustion analysis. kJ/kg is the SI standard; BTU/lb is common in US fuel specifications.
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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