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Specific Properties

Wh/kgtoMJ/kg

Convert watt-hours per kilogram (Wh/kg) to megajoules per kilogram (MJ/kg).

Factor1 Wh/kg = 0.0036 MJ/kg

Converter

Wh/kg

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

Result
3.6MJ/kg

Rendered to 6 significant figures.

Formula

Formula
MJ/kg = Wh/kg × 0.0036

Multiply any value in watt-hours per kilogram by 0.0036 to obtain the value in megajoules per kilogram.

Worked example

Convert 1000 Wh/kg to MJ/kg.

  1. 01Start with 1000 Wh/kg.
  2. 02Multiply by the conversion factor: 1000 × 0.0036 = 3.6 MJ/kg.
Result1000 Wh/kg = 3.6 MJ/kg

Conversion table

Wh/kgMJ/kg
10.0036
20.0072
50.018
100.036
200.072
500.18
1000.36
2000.72
5001.8
10003.6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from Wh/kg to MJ/kg?
1 Wh/kg equals 0.0036 MJ/kg. To convert, multiply the value in watt-hours per kilogram by 0.0036.
How do I convert 1 Wh/kg to MJ/kg?
1 Wh/kg = 0.0036 MJ/kg. For any value, multiply by 0.0036.
How do I convert MJ/kg back to Wh/kg?
Divide by the same factor — or equivalently, multiply by 277.7778. So 1 MJ/kg = 277.778 Wh/kg.
When would I need to convert watt-hour per kilogram to megajoule per kilogram?
Specific-energy conversions between Wh/kg and MJ/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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