joule per gram to kilowatt hour per kilogram
Convert joule per gram (J/g) to kilowatt hour per kilogram (kWh/kg). Use an editable specific energy converter, conversion formula, and reference table.
1 J/g = 0.0002777777778 kWh/kg
Conversion formula
One joule per gram equals 0.0002777777778 kilowatt hour per kilogram. Multiply your value in joule per gram by this factor to get kilowatt hour per kilogram. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 joule per gram:5 × 0.0002777777778 = 0.001388888889 kWh/kg
Conversion table
| joule per gram (J/g) | kilowatt hour per kilogram (kWh/kg) |
|---|---|
| 0.01 | 0.000002777777778 |
| 0.1 | 0.00002777777778 |
| 1 | 0.0002777777778 |
| 2 | 0.0005555555556 |
| 5 | 0.001388888889 |
| 10 | 0.002777777778 |
| 25 | 0.006944444444 |
| 50 | 0.01388888889 |
| 100 | 0.02777777778 |
| 1000 | 0.2777777778 |
About these measurements
Specific energy expresses energy per unit mass.
The base reference used here is the joule per kilogram. One joule per gram is 1,000 base units; one kilowatt hour per kilogram is 3,600,000 base units.
Important distinctions
Compound units must match the quantity and dimension. Temperature intervals use size factors rather than temperature offsets. Calorie and BTU entries use the explicit definitions shown.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert J/g to kWh/kg?
Multiply the quantity in J/g by 0.0002777777778. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the kilowatt hour per kilogram to joule per gram converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
