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Specific Properties

kJ/kgtokWh/kg

Convert kilojoules per kilogram (kJ/kg) to kilowatt-hours per kilogram (kWh/kg).

Factor1 kJ/kg = 0.0002777778 kWh/kg

Converter

kJ/kg

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

Result
1kWh/kg

Rendered to 6 significant figures.

Formula

Formula
kWh/kg = kJ/kg × 0.0002777778

Multiply any value in kilojoules per kilogram by 0.0002777778 to obtain the value in kilowatt-hours per kilogram.

Worked example

Convert 3600 kJ/kg to kWh/kg.

  1. 01Start with 3600 kJ/kg.
  2. 02Multiply by the conversion factor: 3600 × 0.0002777778 = 1 kWh/kg.
Result3600 kJ/kg = 1 kWh/kg

Conversion table

kJ/kgkWh/kg
10.00027778
20.00055556
50.0013889
100.0027778
200.0055556
500.013889
1000.027778
2000.055556
5000.13889
10000.27778

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kJ/kg to kWh/kg?
1 kJ/kg equals 0.0002777778 kWh/kg. To convert, multiply the value in kilojoules per kilogram by 0.0002777778.
How do I convert 1 kJ/kg to kWh/kg?
1 kJ/kg = 0.000277778 kWh/kg. For any value, multiply by 0.0002777778.
How do I convert kWh/kg back to kJ/kg?
Divide by the same factor — or equivalently, multiply by 3600. So 1 kWh/kg = 3600 kJ/kg.
When would I need to convert kilojoule per kilogram to kilowatt-hour per kilogram?
Specific-energy conversions between kJ/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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