Fuel Efficiency Mass / MJ/kg → g/kWh
Convert Megajoules per kilogram to Grams per kilowatt-hour
Convert fuel energy per mass and reciprocal specific fuel consumption. Convert Megajoules per kilogram (MJ/kg) to Grams per kilowatt-hour (g/kWh). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Grams per kilowatt-hour to Megajoules per kilogram →
How to convert megajoules per kilogram to grams per kilowatt-hour
This family describes energy content or energy-normalized fuel use, not kilometers per kilogram. Heating values depend on the fuel and on higher versus lower heating-value conventions. Grams per kWh is the reciprocal of energy per mass.
Use x for the value in MJ/kg, b for the intermediate value in J/kg, and y for the result in g/kWh.
b = (x × 1000000); y = 3600000000 ÷ b
Worked examples
10 MJ/kg ≈ 360 g/kWh
Step 1: (10 × 1000000) ≈ 10000000 J/kg.
Step 2: 3600000000 ÷ 10000000 ≈ 360 g/kWh.20 MJ/kg ≈ 180 g/kWh
Step 1: (20 × 1000000) ≈ 20000000 J/kg.
Step 2: 3600000000 ÷ 20000000 ≈ 180 g/kWh.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Megajoules per kilogram
Megajoules per kilogram (MJ/kg) measures fuel efficiency mass under the conventions above. The base value in J/kg is (x × 1000000), where x is the numerical value in MJ/kg. Factors shown here are rounded for display; calculations use the stored factor.
About Grams per kilowatt-hour
Grams per kilowatt-hour relates inversely to Joules per kilogram. The base value is 3600000000 ÷ x, where x is the numerical value in g/kWh. A zero or negative reciprocal input is outside this calculator’s physical domain.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Megajoules per kilogram to grams per kilowatt-hour reference table
| Megajoules per kilogram (MJ/kg) | Grams per kilowatt-hour (g/kWh) |
|---|---|
| 1 | 3600 |
| 5 | 720 |
| 10 | 360 |
| 25 | 144 |
| 50 | 72 |
| 100 | 36 |
| 1000 | 3.6 |
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