Gigajoule to Kilowatt Hour Formula
kWh = GJ x 277.778
Conversion factors follow SI relationships published by BIPM and NIST, where those standards apply.
Gigajoule to Kilowatt Hour Converter
Quick Answer
1 GJ = 277.778 kWh
Formula: Kilowatt Hour = Gigajoule x 277.778
Quick values
Worked examples
Convert 1 GJ to kWh
kWh = 1 x 277.778
Result: 1 GJ = 277.778 kWh
Convert 10 GJ to kWh
kWh = 10 x 277.778
Result: 10 GJ = 2777.78 kWh
Convert 100 GJ to kWh
kWh = 100 x 277.778
Result: 100 GJ = 27777.8 kWh
About Gigajoule and Kilowatt Hour
The gigajoule (GJ) and the kilowatt hour (kWh) both measure energy. 1 GJ equals 277.778 kWh.
Category hub: Energy Conversion · Conversion charts · Conversion formulas
Gigajoule to Kilowatt Hour Conversion Table
| Gigajoule (GJ) | Kilowatt Hour (kWh) |
|---|---|
| 1 GJ | 277.778 kWh |
| 2 GJ | 555.556 kWh |
| 5 GJ | 1388.89 kWh |
| 10 GJ | 2777.78 kWh |
| 25 GJ | 6944.44 kWh |
| 50 GJ | 13888.9 kWh |
| 100 GJ | 27777.8 kWh |
| 250 GJ | 69444.4 kWh |
| 500 GJ | 138889 kWh |
| 1000 GJ | 277778 kWh |
Browse all conversion charts → · Browse conversion formulas →
Practical use cases for Gigajoule to Kilowatt Hour
Utility Billing and Energy Audits
Electric bills use kilowatt-hours while some engineering reports use gigajoules or megajoules. Audits convert so site energy totals match the utility statement.
Building Performance
Energy-use intensity and plant reports mix kWh, GJ, and BTU. Facility teams convert before comparing buildings or year-over-year totals.
Industrial Process Heat
Boiler and furnace energy inputs are often quoted in GJ or therms while electrical auxiliaries stay in kWh. Conversion is needed for a combined energy balance.
Transportation Fuels
Fuel-energy content is published in MJ/L or BTU/gal while EV comparisons use kWh. Analysts convert to a common energy unit before efficiency claims.
Scientific and Laboratory Work
Calorimetry and thermodynamics use joules and calories; applied reports often prefer kWh. Converting keeps experimental values comparable to plant data.
Carbon and Sustainability Reporting
GHG protocols accept energy in GJ or kWh depending on the factor table. Reporters convert activity data to the unit required by the emission factor.
Gigajoule to Kilowatt Hour FAQs
Common questions about converting gigajoule to kilowatt hour.
How do you convert gigajoule to kilowatt hour?
Use kWh = GJ x 277.778. For example, 1 GJ = 277.778 kWh.
What is 1 GJ in kilowatt hour?
1 GJ = 277.778 kWh. See the conversion table above for more values.
Where does the gigajoule to kilowatt hour factor come from?
The calculator uses the shared conversion library aligned with SI relationships published by NIST and BIPM where those standards apply.
Is this gigajoule to kilowatt hour converter free?
Yes. The calculator and the printable reference table are completely free, with no sign-up required.
Charts and printable PDF
Use the matching gigajoule / kilowatt hour chart when you need a printable table or offline reference.
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