Kilojoule (kJ)
A kilojoule is one thousand joules — the metric counterpart to the kilocalorie on food labels.
Kilojoules appear on Australian and European nutrition labels alongside or instead of kilocalories.
Kilojoule to Calorie (Nutritional / Food Calorie)
Convert kilojoule to calorie (nutritional / food calorie) instantly. Type in either field — results update live.
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Energy Kilojoule Calorie (Nutritional / Food Calorie)
1 kilojoule = 0.2390057361 kilocalories (food Calories)
Unit
Unit
Conversion table
Selected kJ values converted to Cal using the exact factor from this tool.
| kJ | Cal |
|---|---|
| 0.01 | 0.0023900574 |
| 0.1 | 0.0239005736 |
| 1 | 0.2390057361 |
| 2 | 0.4780114723 |
| 3 | 0.7170172084 |
| 5 | 1.1950286807 |
| 10 | 2.3900573614 |
| 20 | 4.7801147228 |
| 50 | 11.9502868069 |
| 100 | 23.9005736138 |
| 1,000 | 239.0057361377 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 kJ = 0.2390057361 Cal
1 Cal = 4.184 kJ
To convert kilojoule to calorie (nutritional / food calorie), multiply by 0.2390057361.
To convert calorie (nutritional / food calorie) to kilojoule, multiply by 4.184.
Example: convert 10 kJ to Cal
10 × 0.2390057361 = 2.3900573614 Cal
About these units
Short background on the units used in this conversion.
Calorie (Nutritional / Food Calorie) (Cal)
The food Calorie (capital C) equals one kilocalorie — 4,184 joules in this converter (thermochemical kcal, matching nutrition labels).
Food Calories label packaged meals, diet apps, and nutrition facts panels worldwide.
Frequently asked questions
How many kilocalories (food Calories) are in one kilojoule?
One kilojoule equals 0.2390057361 kilocalories (food Calories). Multiply your kilojoules value by 0.2390057361 to convert to kilocalories (food Calories).
What is the conversion formula?
Cal = kJ × 0.2390057361The reverse is
kJ = Cal × 4.184, using the same exact factors as this converter.Is this Kilojoule to Calorie (Nutritional / Food Calorie) converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All kilojoule conversions
Jump to any energy conversion starting from kilojoule — including the reverse direction and every other unit in our dataset.
calorie (nutritional / food calorie) (Cal) → kilojoule (kJ)
kilojoule (kJ) → joule (J)kilojoule (kJ) → megajoule (MJ)kilojoule (kJ) → gigajoule (GJ)kilojoule (kJ) → kilowatt-hour (kW·h)kilojoule (kJ) → watt-hour (W·h)kilojoule (kJ) → kilocalorie (it) (kcal (IT))kilojoule (kJ) → kilocalorie (thermochemical) (kcal (th))kilojoule (kJ) → calorie (it) (cal (IT))kilojoule (kJ) → calorie (thermochemical) (cal (th))kilojoule (kJ) → british thermal unit (it) (Btu (IT))kilojoule (kJ) → british thermal unit (thermochemical) (Btu (th))kilojoule (kJ) → foot-pound (ft·lbf)kilojoule (kJ) → newton meter (N·m)kilojoule (kJ) → horsepower hour (mechanical) (hp·h)kilojoule (kJ) → horsepower (metric) hour (metric hp·h)kilojoule (kJ) → millijoule (mJ)kilojoule (kJ) → microjoule (µJ)kilojoule (kJ) → nanojoule (nJ)kilojoule (kJ) → attojoule (aJ)kilojoule (kJ) → megaelectron-volt (MeV)kilojoule (kJ) → kiloelectron-volt (keV)kilojoule (kJ) → electron-volt (eV)kilojoule (kJ) → ergkilojoule (kJ) → gigawatt-hour (GW·h)kilojoule (kJ) → megawatt-hour (MW·h)kilojoule (kJ) → kilowatt-second (kW·s)kilojoule (kJ) → watt-second (W·s)kilojoule (kJ) → mega british thermal unit (it) (MBtu (IT))kilojoule (kJ) → ton-hour (refrigeration) (ton·h)kilojoule (kJ) → fuel oil equivalent @ kiloliter (kL oil eq)kilojoule (kJ) → fuel oil equivalent @ barrel (us) (bbl oil eq)kilojoule (kJ) → gigaton (tnt) (Gton)kilojoule (kJ) → megaton (tnt) (Mton)kilojoule (kJ) → kiloton (tnt) (kton)kilojoule (kJ) → ton (explosives / tnt) (ton TNT)kilojoule (kJ) → dyne centimeter (dyn·cm)kilojoule (kJ) → gram-force meter (gf·m)kilojoule (kJ) → gram-force centimeter (gf·cm)kilojoule (kJ) → kilogram-force centimeter (kgf·cm)kilojoule (kJ) → kilogram-force meter (kgf·m)kilojoule (kJ) → kilopond meter (kp·m)kilojoule (kJ) → pound-force foot (lbf·ft)kilojoule (kJ) → pound-force inch (lbf·in)kilojoule (kJ) → ounce-force inch (ozf·in)kilojoule (kJ) → inch-pound (in·lbf)kilojoule (kJ) → inch-ounce (in·ozf)kilojoule (kJ) → poundal foot (pdl·ft)kilojoule (kJ) → thermkilojoule (kJ) → therm (ec)kilojoule (kJ) → therm (us)kilojoule (kJ) → hartree energy (Eh)kilojoule (kJ) → rydberg constant (Ry)