Convert Kilocalorie to Joule Online

About Kilocalorie to Joule Conversion

This converter converts Kilocalorie (kcal) to Joule (J). One Kilocalorie (kcal) equals 4184 Joule (J).

Formula:

1 Kilocalorie (kcal) = 4184 Joule (J)

Example:

1 kcal = 4184 J
2 kcal = 8368 J

Kilocalorie (kcal) to Joule (J) Conversion

A clear guide to converting Kilocalorie into Joule. Includes numeric examples, formulas, and a breakdown of where this conversion appears in science, engineering, and daily applications.

Conversion Formula

Joule = Kilocalorie × 4184

To convert Kilocalorie (kcal) to Joule (J), multiply the value by 4184. This factor is obtained by comparing their exact meter definitions.

Worked Example

Convert 1 kcal to J.

  • Step 1: Write the formula: J = kcal × 4184
  • Step 2: Substitute: 1 × 4184
  • Step 3: Result: 4184 J
So, 1 kcal = 4184 J.

About the Units

Kilocalorie (kcal)

One Kilocalorie (kcal) equals 4184 Joule (J)

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

Joule (J)

One Joule (J) equals 0.000239 Kilocalorie (kcal)

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

Where This Conversion Is Used

  • Converting values from Kilocalorie to Joule for engineering or scientific workflows.
  • Used when normalizing mixed-unit datasets requiring consistent Joule representation.
  • Applied when comparing different measurement systems across tools and documents.

Frequently Asked Questions

How many Joule (J) are in 1 Kilocalorie (kcal)?

1 kcal = 4184 J.

What is the formula for converting Kilocalorie (kcal) to Joule (J)?

Multiply the kcal value by 4184.

Can I reverse the conversion?

Yes. 1 J = 0.000239 kcal.

Conclusion

By applying the conversion factor shown above, you can reliably convert Kilocalorie (kcal) to Joule (J) 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 Joule to Other Units

Joule to Kilojoule

1 J = 0.001 kJ

1 Joule (J) = 0.001 Kilojoule (kJ)

1 J equals 0.001 kJ.

Joule to Megajoule

1 J = 0.000001 MJ

1 Joule (J) = 0.000001 Megajoule (MJ)

1 J equals 0.000001 MJ.

Joule to Gigajoule

1 J = 1e-9 GJ

1 Joule (J) = 1e-9 Gigajoule (GJ)

1 J equals 1e-9 GJ.

Joule to Watt-hour

1 J = 0.0002777777777777778 Wh

1 Joule (J) = 0.0002777777777777778 Watt-hour (Wh)

1 J equals 0.0002777777777777778 Wh.

Joule to Kilowatt-hour

1 J = 2.7777777777777776e-7 kWh

1 Joule (J) = 2.7777777777777776e-7 Kilowatt-hour (kWh)

1 J equals 2.7777777777777776e-7 kWh.

Joule to Megawatt-hour

1 J = 2.7777777777777777e-10 MWh

1 Joule (J) = 2.7777777777777777e-10 Megawatt-hour (MWh)

1 J equals 2.7777777777777777e-10 MWh.

Joule to Erg

1 J = 10000000 erg

1 Joule (J) = 10000000 Ergs

1 J equals 10000000 ergs.

Joule to Calorie

1 J = 0.2390057361376673 cal

1 Joule (J) = 0.2390057361376673 Calorie (cal)

1 J equals 0.2390057361376673 cal.

Joule to Kilocalorie

1 J = 0.0002390057361376673 kcal

1 Joule (J) = 0.0002390057361376673 Kilocalorie (kcal)

1 J equals 0.0002390057361376673 kcal.

Joule to British Thermal Unit

1 J = 0.0009478133944988911 BTU

1 Joule (J) = 0.0009478133944988911 British Thermal Unit (BTU)

1 J equals 0.0009478133944988911 BTU.

Joule to Foot-pound force

1 J = 0.7375621494575464 ft_lbf

1 Joule (J) = 0.7375621494575464 Foot-pound force (ft⋅lbf)

1 J equals 0.7375621494575464 ft_lbf.

Joule to Horsepower-hour

1 J = 3.7250648813175704e-7 hp_h

1 Joule (J) = 3.7250648813175704e-7 Horsepower-hour (hp⋅h)

1 J equals 3.7250648813175704e-7 hp_h.

Joule to Therm

1 J = 9.478133944988911e-9 therm_us

1 Joule (J) = 9.478133944988911e-9 Therm (US)

1 J equals 9.478133944988911e-9 therm_us.

Joule to Electronvolt

1 J = 6241509074460763000 eV

1 Joule (J) = 6241509074460763000 Electronvolts (eV)

1 J equals 6241509074460763000 eVs.

Joule to Kiloelectronvolt

1 J = 6241509074460763 keV

1 Joule (J) = 6241509074460763 Kiloelectronvolts (keV)

1 J equals 6241509074460763 keVs.

Joule to Megaelectronvolt

1 J = 6241509074460.763 MeV

1 Joule (J) = 6241509074460.763 Megaelectronvolts (MeV)

1 J equals 6241509074460.763 MeVs.

Joule to Gigaelectronvolt

1 J = 6241509074.460762 GeV

1 Joule (J) = 6241509074.460762 Gigaelectronvolts (GeV)

1 J equals 6241509074.460762 GeVs.

Joule to Tonne of Oil Equivalent

1 J = 2.3884589662749594e-11 toe

1 Joule (J) = 2.3884589662749594e-11 Tonne of Oil Equivalent (toe)

1 J equals 2.3884589662749594e-11 toe.

Joule to Tonne of Coal Equivalent

1 J = 3.412084237535656e-11 tce

1 Joule (J) = 3.412084237535656e-11 Tonne of Coal Equivalent (tce)

1 J equals 3.412084237535656e-11 tce.

Joule to Hartree

1 J = 229371227839632480 hartree

1 Joule (J) = 229371227839632480 Hartrees

1 J equals 229371227839632480 hartrees.