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Specific Properties

J/kgtokWh/kg

Convert joules per kilogram (J/kg) to kilowatt-hours per kilogram (kWh/kg).

Factor1 J/kg = 2.777778e-7 kWh/kg

Converter

J/kg

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

Result
1kWh/kg

Rendered to 6 significant figures.

Formula

Formula
kWh/kg = J/kg × 2.777778e-7

Multiply any value in joules per kilogram by 2.777778e-7 to obtain the value in kilowatt-hours per kilogram.

Worked example

Convert 3.60000e+6 J/kg to kWh/kg.

  1. 01Start with 3.60000e+6 J/kg.
  2. 02Multiply by the conversion factor: 3.60000e+6 × 2.777778e-7 = 1 kWh/kg.
Result3.60000e+6 J/kg = 1 kWh/kg

Conversion table

J/kgkWh/kg
12.7778e-7
25.5556e-7
51.3889e-6
102.7778e-6
205.5556e-6
501.3889e-5
1002.7778e-5
2005.5556e-5
5000.00013889
10000.00027778

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from J/kg to kWh/kg?
1 J/kg equals 2.777778e-7 kWh/kg. To convert, multiply the value in joules per kilogram by 2.777778e-7.
How do I convert 1 J/kg to kWh/kg?
1 J/kg = 2.77778e-7 kWh/kg. For any value, multiply by 2.777778e-7.
How do I convert kWh/kg back to J/kg?
Divide by the same factor — or equivalently, multiply by 3600000. So 1 kWh/kg = 3.60000e+6 J/kg.
When would I need to convert joule per kilogram to kilowatt-hour per kilogram?
Specific-energy conversions between J/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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