Decajoule is 10 joule units.
Decajoules to kWhs Converter — daJ to kWh
Convert Decajoule (daJ) to kWh (kWh) using the exact conversion factor (1 decajoule = 0.0000027778 kwh). See the formula, worked examples, conversion table, history, and common uses.
Decajoules to kWhs converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
A kilowatt-hour is 3.6 million joules.
Result = input x 10 / 3.6e+6.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Decajoules to kWhs
Decajoule and kWh both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Decajoule is 10 joule units, and a kilowatt-hour is 3.6 million joules.
Formula
kwhs = decajoules × 0.00000277777777778
This factor comes from each unit's defined relationship to the category's base unit: 1 decajoule equals 10 base units, and 1 kwh equals 3600000 base units, so dividing one by the other gives the direct decajoule-to-kwh factor of 0.00000277777777778.
Simple example
1 daJ × 0.000002777777778 = 0.0000027778 kWh
1 decajoule = 0.0000027778 kwhs.
Real-world example
100 daJ × 0.000002777777778 = 0.0002777778 kWh
100 decajoules = 0.0002777778 kwhs.
Conversion table
| Decajoule (daJ) | kWh (kWh) |
|---|---|
| 1 daJ | 0.0000027778 kWh |
| 10 daJ | 0.0000277778 kWh |
| 100 daJ | 0.0002777778 kWh |
| 500 daJ | 0.0013888889 kWh |
| 1,000 daJ | 0.0027777778 kWh |
| 2,000 daJ | 0.0055555556 kWh |
Reverse conversion: kWh to Decajoule
0.0000027778 kWh × 360000 = 1.000008 daJ
0.0000027778 kwhs = 1.000008 decajoules.
decajoules = kwhs × 360000
For a page dedicated to this direction, see kWh to Decajoule.
Understanding the Decajoule (daJ)
Decajoule is 10 joule units.
Understanding the kWh
kWh (kWh) measures energy. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. It is classified as a Non-SI unit accepted for use with SI.
Where it's used: Used worldwide for electricity billing
Uses of the kWh today
- Residential and commercial electricity billing worldwide
- Battery capacity ratings (especially electric vehicles)
- Energy policy and grid-scale power statistics
History of the kWh
The kilowatt-hour became the standard electricity billing unit as power utilities expanded in the late 19th and early 20th centuries, since it conveniently matches the scale of typical household electricity consumption, unlike the much smaller joule.
Historical origin. kWh was not the invention of a single named person; it developed through the process described above.
kWh — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the kilowatt-hour among accepted non-SI energy units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kwhs are in 1 decajoule?
1 decajoule equals 0.0000027778 kwhs, using the exact defined conversion factor rather than an estimate.
How do I convert decajoule to kwh?
Multiply the decajoule value by 0.000002777777778. The converter above does this instantly to whatever precision you set.
How do I convert kwh back to decajoule?
Use the reverse factor: 1 kwh equals 360,000 decajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a decajoule?
Decajoule (daJ) is a unit of energy.
What is a kwh?
kWh (kWh) measures energy. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. It is classified as a Non-SI unit accepted for use with SI.
Is the decajoule to kwh conversion exact?
Yes. A kilowatt-hour is the energy of one kilowatt of power sustained for one hour: exactly 3,600,000 joules. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.