Convert Gigajoule to Watt-hour Online

About Gigajoule to Watt-hour Conversion

This converter converts Gigajoule (GJ) to Watt-hour (Wh). One Gigajoule (GJ) equals 277777.77777777775 Watt-hour (Wh).

Formula:

1 Gigajoule (GJ) = 277777.77777777775 Watt-hour (Wh)

Example:

1 GJ = 277777.77777777775 Wh
2 GJ = 555555.5555555555 Wh

Gigajoule (GJ) to Watt-hour (Wh) Conversion

Gigajoule to Watt-hour conversion explained with exact factors, step-by-step examples, and situations where this conversion is commonly used.

Conversion Formula

Watt-hour = Gigajoule × 277777.777778

To convert Gigajoule (GJ) to Watt-hour (Wh), multiply the value by 277777.777778. This factor is obtained by comparing their exact meter definitions.

Worked Example

Convert 1 GJ to Wh.

  • Step 1: Write the formula: Wh = GJ × 277777.777778
  • Step 2: Substitute: 1 × 277777.777778
  • Step 3: Result: 277777.777778 Wh
So, 1 GJ = 277777.777778 Wh.

About the Units

Gigajoule (GJ)

One Gigajoule (GJ) equals 277777.777778 Watt-hour (Wh)

Used for extremely large distances such as astronomical or planetary scales.

Watt-hour (Wh)

One Watt-hour (Wh) equals 3.600000e-6 Gigajoule (GJ)

A widely used unit across scientific, engineering, and measurement contexts.

Where This Conversion Is Used

  • Converting values from Gigajoule to Watt-hour for engineering or scientific workflows.
  • Used when normalizing mixed-unit datasets requiring consistent Watt-hour representation.
  • Applied when comparing different measurement systems across tools and documents.
  • Essential in astronomy, orbital mechanics, and large-scale simulations.

Frequently Asked Questions

How many Watt-hour (Wh) are in 1 Gigajoule (GJ)?

1 GJ = 277777.777778 Wh.

What is the formula for converting Gigajoule (GJ) to Watt-hour (Wh)?

Multiply the GJ value by 277777.777778.

Can I reverse the conversion?

Yes. 1 Wh = 3.600000e-6 GJ.

Conclusion

By applying the conversion factor shown above, you can reliably convert Gigajoule (GJ) to Watt-hour (Wh) for use in scientific analysis, engineering calculations, academic work, or daily measurements.

Quick Links for Unit Converters

Convert Gigajoule to Other Units

Gigajoule to Joule

1 GJ = 1000000000 J

1 Gigajoule (GJ) = 1000000000 Joules (J)

1 GJ equals 1000000000 Js.

Gigajoule to Kilojoule

1 GJ = 1000000 kJ

1 Gigajoule (GJ) = 1000000 Kilojoules (kJ)

1 GJ equals 1000000 kJs.

Gigajoule to Megajoule

1 GJ = 1000 MJ

1 Gigajoule (GJ) = 1000 Megajoules (MJ)

1 GJ equals 1000 MJs.

Gigajoule to Watt-hour

1 GJ = 277777.77777777775 Wh

1 Gigajoule (GJ) = 277777.77777777775 Watt-hours (Wh)

1 GJ equals 277777.77777777775 Whs.

Gigajoule to Kilowatt-hour

1 GJ = 277.77777777777777 kWh

1 Gigajoule (GJ) = 277.77777777777777 Kilowatt-hours (kWh)

1 GJ equals 277.77777777777777 kWhs.

Gigajoule to Megawatt-hour

1 GJ = 0.2777777777777778 MWh

1 Gigajoule (GJ) = 0.2777777777777778 Megawatt-hour (MWh)

1 GJ equals 0.2777777777777778 MWh.

Gigajoule to Erg

1 GJ = 10000000000000000 erg

1 Gigajoule (GJ) = 10000000000000000 Ergs

1 GJ equals 10000000000000000 ergs.

Gigajoule to Calorie

1 GJ = 239005736.1376673 cal

1 Gigajoule (GJ) = 239005736.1376673 Calories (cal)

1 GJ equals 239005736.1376673 cals.

Gigajoule to Kilocalorie

1 GJ = 239005.7361376673 kcal

1 Gigajoule (GJ) = 239005.7361376673 Kilocalories (kcal)

1 GJ equals 239005.7361376673 kcals.

Gigajoule to British Thermal Unit

1 GJ = 947813.3944988911 BTU

1 Gigajoule (GJ) = 947813.3944988911 British Thermal Units (BTU)

1 GJ equals 947813.3944988911 BTUs.

Gigajoule to Foot-pound force

1 GJ = 737562149.4575465 ft_lbf

1 Gigajoule (GJ) = 737562149.4575465 Foot-pound forces (ft⋅lbf)

1 GJ equals 737562149.4575465 ft_lbves.

Gigajoule to Horsepower-hour

1 GJ = 372.506488131757 hp_h

1 Gigajoule (GJ) = 372.506488131757 Horsepower-hours (hp⋅h)

1 GJ equals 372.506488131757 hp_hs.

Gigajoule to Therm

1 GJ = 9.47813394498891 therm_us

1 Gigajoule (GJ) = 9.47813394498891 Therms (US)

1 GJ equals 9.47813394498891 therm_uses.

Gigajoule to Electronvolt

1 GJ = 6.241509074460763e+27 eV

1 Gigajoule (GJ) = 6.241509074460763e+27 Electronvolts (eV)

1 GJ equals 6.241509074460763e+27 eVs.

Gigajoule to Kiloelectronvolt

1 GJ = 6.241509074460763e+24 keV

1 Gigajoule (GJ) = 6.241509074460763e+24 Kiloelectronvolts (keV)

1 GJ equals 6.241509074460763e+24 keVs.

Gigajoule to Megaelectronvolt

1 GJ = 6.241509074460763e+21 MeV

1 Gigajoule (GJ) = 6.241509074460763e+21 Megaelectronvolts (MeV)

1 GJ equals 6.241509074460763e+21 MeVs.

Gigajoule to Gigaelectronvolt

1 GJ = 6241509074460762000 GeV

1 Gigajoule (GJ) = 6241509074460762000 Gigaelectronvolts (GeV)

1 GJ equals 6241509074460762000 GeVs.

Gigajoule to Tonne of Oil Equivalent

1 GJ = 0.023884589662749593 toe

1 Gigajoule (GJ) = 0.023884589662749593 Tonne of Oil Equivalent (toe)

1 GJ equals 0.023884589662749593 toe.

Gigajoule to Tonne of Coal Equivalent

1 GJ = 0.034120842375356564 tce

1 Gigajoule (GJ) = 0.034120842375356564 Tonne of Coal Equivalent (tce)

1 GJ equals 0.034120842375356564 tce.

Gigajoule to Hartree

1 GJ = 2.293712278396325e+26 hartree

1 Gigajoule (GJ) = 2.293712278396325e+26 Hartrees

1 GJ equals 2.293712278396325e+26 hartrees.

Convert Watt-hour to Other Units

Watt-hour to Joule

1 Wh = 3600 J

1 Watt-hour (Wh) = 3600 Joules (J)

1 Wh equals 3600 Js.

Watt-hour to Kilojoule

1 Wh = 3.6 kJ

1 Watt-hour (Wh) = 3.6 Kilojoules (kJ)

1 Wh equals 3.6 kJs.

Watt-hour to Megajoule

1 Wh = 0.0036 MJ

1 Watt-hour (Wh) = 0.0036 Megajoule (MJ)

1 Wh equals 0.0036 MJ.

Watt-hour to Gigajoule

1 Wh = 0.0000036 GJ

1 Watt-hour (Wh) = 0.0000036 Gigajoule (GJ)

1 Wh equals 0.0000036 GJ.

Watt-hour to Kilowatt-hour

1 Wh = 0.001 kWh

1 Watt-hour (Wh) = 0.001 Kilowatt-hour (kWh)

1 Wh equals 0.001 kWh.

Watt-hour to Megawatt-hour

1 Wh = 0.000001 MWh

1 Watt-hour (Wh) = 0.000001 Megawatt-hour (MWh)

1 Wh equals 0.000001 MWh.

Watt-hour to Erg

1 Wh = 36000000000 erg

1 Watt-hour (Wh) = 36000000000 Ergs

1 Wh equals 36000000000 ergs.

Watt-hour to Calorie

1 Wh = 860.4206500956022 cal

1 Watt-hour (Wh) = 860.4206500956022 Calories (cal)

1 Wh equals 860.4206500956022 cals.

Watt-hour to Kilocalorie

1 Wh = 0.8604206500956023 kcal

1 Watt-hour (Wh) = 0.8604206500956023 Kilocalorie (kcal)

1 Wh equals 0.8604206500956023 kcal.

Watt-hour to British Thermal Unit

1 Wh = 3.412128220196008 BTU

1 Watt-hour (Wh) = 3.412128220196008 British Thermal Units (BTU)

1 Wh equals 3.412128220196008 BTUs.

Watt-hour to Foot-pound force

1 Wh = 2655.223738047167 ft_lbf

1 Watt-hour (Wh) = 2655.223738047167 Foot-pound forces (ft⋅lbf)

1 Wh equals 2655.223738047167 ft_lbves.

Watt-hour to Horsepower-hour

1 Wh = 0.0013410233572743254 hp_h

1 Watt-hour (Wh) = 0.0013410233572743254 Horsepower-hour (hp⋅h)

1 Wh equals 0.0013410233572743254 hp_h.

Watt-hour to Therm

1 Wh = 0.00003412128220196008 therm_us

1 Watt-hour (Wh) = 0.00003412128220196008 Therm (US)

1 Wh equals 0.00003412128220196008 therm_us.

Watt-hour to Electronvolt

1 Wh = 2.2469432668058747e+22 eV

1 Watt-hour (Wh) = 2.2469432668058747e+22 Electronvolts (eV)

1 Wh equals 2.2469432668058747e+22 eVs.

Watt-hour to Kiloelectronvolt

1 Wh = 22469432668058747000 keV

1 Watt-hour (Wh) = 22469432668058747000 Kiloelectronvolts (keV)

1 Wh equals 22469432668058747000 keVs.

Watt-hour to Megaelectronvolt

1 Wh = 22469432668058744 MeV

1 Watt-hour (Wh) = 22469432668058744 Megaelectronvolts (MeV)

1 Wh equals 22469432668058744 MeVs.

Watt-hour to Gigaelectronvolt

1 Wh = 22469432668058.746 GeV

1 Watt-hour (Wh) = 22469432668058.746 Gigaelectronvolts (GeV)

1 Wh equals 22469432668058.746 GeVs.

Watt-hour to Tonne of Oil Equivalent

1 Wh = 8.598452278589854e-8 toe

1 Watt-hour (Wh) = 8.598452278589854e-8 Tonne of Oil Equivalent (toe)

1 Wh equals 8.598452278589854e-8 toe.

Watt-hour to Tonne of Coal Equivalent

1 Wh = 1.2283503255128362e-7 tce

1 Watt-hour (Wh) = 1.2283503255128362e-7 Tonne of Coal Equivalent (tce)

1 Wh equals 1.2283503255128362e-7 tce.

Watt-hour to Hartree

1 Wh = 825736420222677000000 hartree

1 Watt-hour (Wh) = 825736420222677000000 Hartrees

1 Wh equals 825736420222677000000 hartrees.