Joules per gram to Watt hours per kilogram converter
Convert Joules per gram (J/g) to Watt hours per kilogram (Wh/kg) for specific energy. Check the formula and worked example.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Value | Enter value using the definition in the method and example. |
| From | Select the unit or currency in which the entered number is currently expressed. |
| To | Select the unit or currency you need for the answer. |
Understanding your result
The converted value describes the same specific energy quantity in the selected target unit. Display rounding does not add precision to the original measurement.
Common mistakes
- Confusing the source and target units, or overlooking a prefix or case-sensitive symbol.
Check your calculation
- Convert to the target unit and then reverse the direction. Within display rounding, you should recover the original value.
Read the specific energy measurement guide · Calculation checks, sources and review limits
How do I convert Joules per gram to Watt hours per kilogram?
Enter the known measurement and select its source and target units. The converter expresses the same specific energy quantity in the target unit, using the stated definitions.
Common uses
- Compare measurements stated in different units.
- Translate a known value before using it in a formula or specification.
How it works
Convert through the shared base quantity using the two defined factors. Specific energy is not volumetric energy density. Radiation absorbed dose also has J/kg dimensions but a distinct meaning. Conversion changes the unit of a known measurement; it does not calculate another physical quantity or imply a material model. Factors with π or repeating rational values use finite precision; results display up to 12 significant digits.
Worked example
10 J/g equals approximately 2.77777777778 Wh/kg. Reverse the units to convert in the other direction.
Common values
Use “Swap units” above for the reverse conversion. Values below are rounded to six significant digits.
| Joules per gram | Watt hours per kilogram |
|---|---|
| 1 | 0.277778 |
| 5 | 1.38889 |
| 10 | 2.77778 |
| 20 | 5.55556 |
| 30 | 8.33333 |
| 50 | 13.8889 |
| 100 | 27.7778 |