Convert Kilocalorie to Gigajoule Online

About Kilocalorie to Gigajoule Conversion

This converter converts Kilocalorie (kcal) to Gigajoule (GJ). One Kilocalorie (kcal) equals 0.000004184 Gigajoule (GJ).

Formula:

1 Kilocalorie (kcal) = 0.000004184 Gigajoule (GJ)

Example:

1 kcal = 0.000004184 GJ
2 kcal = 0.000008368 GJ

Kilocalorie (kcal) to Gigajoule (GJ) Conversion

Convert Kilocalorie to Gigajoule using the exact conversion factor. This page provides the formula, worked examples, and real-world use cases for practical understanding.

Conversion Formula

Gigajoule = Kilocalorie × 4.184000e-6

To convert Kilocalorie (kcal) to Gigajoule (GJ), multiply the value by 4.184000e-6. This factor is obtained by comparing their exact meter definitions.

Worked Example

Convert 1 kcal to GJ.

  • Step 1: Write the formula: GJ = kcal × 4.184000e-6
  • Step 2: Substitute: 1 × 4.184000e-6
  • Step 3: Result: 4.184000e-6 GJ
So, 1 kcal = 4.184000e-6 GJ.

About the Units

Kilocalorie (kcal)

One Kilocalorie (kcal) equals 4.184000e-6 Gigajoule (GJ)

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

Gigajoule (GJ)

One Gigajoule (GJ) equals 239005.736138 Kilocalorie (kcal)

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

Where This Conversion Is Used

  • Converting values from Kilocalorie to Gigajoule for engineering or scientific workflows.
  • Used when normalizing mixed-unit datasets requiring consistent Gigajoule 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 Gigajoule (GJ) are in 1 Kilocalorie (kcal)?

1 kcal = 4.184000e-6 GJ.

What is the formula for converting Kilocalorie (kcal) to Gigajoule (GJ)?

Multiply the kcal value by 4.184000e-6.

Can I reverse the conversion?

Yes. 1 GJ = 239005.736138 kcal.

Conclusion

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

Quick Links for Unit Converters

Convert Kilocalorie to Other Units

Kilocalorie to Joule

1 kcal = 4184 J

1 Kilocalorie (kcal) = 4184 Joules (J)

1 kcal equals 4184 Js.

Kilocalorie to Kilojoule

1 kcal = 4.184 kJ

1 Kilocalorie (kcal) = 4.184 Kilojoules (kJ)

1 kcal equals 4.184 kJs.

Kilocalorie to Megajoule

1 kcal = 0.004184 MJ

1 Kilocalorie (kcal) = 0.004184 Megajoule (MJ)

1 kcal equals 0.004184 MJ.

Kilocalorie to Gigajoule

1 kcal = 0.000004184 GJ

1 Kilocalorie (kcal) = 0.000004184 Gigajoule (GJ)

1 kcal equals 0.000004184 GJ.

Kilocalorie to Watt-hour

1 kcal = 1.1622222222222223 Wh

1 Kilocalorie (kcal) = 1.1622222222222223 Watt-hours (Wh)

1 kcal equals 1.1622222222222223 Whs.

Kilocalorie to Kilowatt-hour

1 kcal = 0.0011622222222222223 kWh

1 Kilocalorie (kcal) = 0.0011622222222222223 Kilowatt-hour (kWh)

1 kcal equals 0.0011622222222222223 kWh.

Kilocalorie to Megawatt-hour

1 kcal = 0.0000011622222222222223 MWh

1 Kilocalorie (kcal) = 0.0000011622222222222223 Megawatt-hour (MWh)

1 kcal equals 0.0000011622222222222223 MWh.

Kilocalorie to Erg

1 kcal = 41840000000 erg

1 Kilocalorie (kcal) = 41840000000 Ergs

1 kcal equals 41840000000 ergs.

Kilocalorie to Calorie

1 kcal = 1000 cal

1 Kilocalorie (kcal) = 1000 Calories (cal)

1 kcal equals 1000 cals.

Kilocalorie to British Thermal Unit

1 kcal = 3.9656512425833603 BTU

1 Kilocalorie (kcal) = 3.9656512425833603 British Thermal Units (BTU)

1 kcal equals 3.9656512425833603 BTUs.

Kilocalorie to Foot-pound force

1 kcal = 3085.9600333303742 ft_lbf

1 Kilocalorie (kcal) = 3085.9600333303742 Foot-pound forces (ft⋅lbf)

1 kcal equals 3085.9600333303742 ft_lbves.

Kilocalorie to Horsepower-hour

1 kcal = 0.0015585671463432713 hp_h

1 Kilocalorie (kcal) = 0.0015585671463432713 Horsepower-hour (hp⋅h)

1 kcal equals 0.0015585671463432713 hp_h.

Kilocalorie to Therm

1 kcal = 0.000039656512425833605 therm_us

1 Kilocalorie (kcal) = 0.000039656512425833605 Therm (US)

1 kcal equals 0.000039656512425833605 therm_us.

Kilocalorie to Electronvolt

1 kcal = 2.6114473967543833e+22 eV

1 Kilocalorie (kcal) = 2.6114473967543833e+22 Electronvolts (eV)

1 kcal equals 2.6114473967543833e+22 eVs.

Kilocalorie to Kiloelectronvolt

1 kcal = 26114473967543833000 keV

1 Kilocalorie (kcal) = 26114473967543833000 Kiloelectronvolts (keV)

1 kcal equals 26114473967543833000 keVs.

Kilocalorie to Megaelectronvolt

1 kcal = 26114473967543828 MeV

1 Kilocalorie (kcal) = 26114473967543828 Megaelectronvolts (MeV)

1 kcal equals 26114473967543828 MeVs.

Kilocalorie to Gigaelectronvolt

1 kcal = 26114473967543.83 GeV

1 Kilocalorie (kcal) = 26114473967543.83 Gigaelectronvolts (GeV)

1 kcal equals 26114473967543.83 GeVs.

Kilocalorie to Tonne of Oil Equivalent

1 kcal = 9.993312314894431e-8 toe

1 Kilocalorie (kcal) = 9.993312314894431e-8 Tonne of Oil Equivalent (toe)

1 kcal equals 9.993312314894431e-8 toe.

Kilocalorie to Tonne of Coal Equivalent

1 kcal = 1.4276160449849187e-7 tce

1 Kilocalorie (kcal) = 1.4276160449849187e-7 Tonne of Coal Equivalent (tce)

1 kcal equals 1.4276160449849187e-7 tce.

Kilocalorie to Hartree

1 kcal = 959689217281022400000 hartree

1 Kilocalorie (kcal) = 959689217281022400000 Hartrees

1 kcal equals 959689217281022400000 hartrees.

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.