Kilocalories to kilojoules
Unit conversionHow many kilojoules is a kilocalorie?
Multiply kilocalories by 4.184 to get kilojoules, or enter any energy to convert it.
What you enter stays on your device while you use this tool. Opening a shared link sends the settings in its address to HowToolbox to prepare the page.
Result
4.184 kJ
1 kilocalorie equals 4.184 kilojoules
- The other way round: 1 kJ ≈ 0.239 kcal.
- Exact by definition: 1 kJ = 1,000 J.
In all units
- Joules
- 4,184 J
- Kilojoules
- 4.184 kJ
- Watt-hours
- 1.162 Wh
- Kilowatt-hours
- 0.001162 kWh
- Megajoules
- 0.004184 MJ
- Calories
- 1,000 cal
- Kilocalories
- 1 kcal
- British thermal units
- 3.966 BTU
- Electronvolts
- 2.611 × 10²² eV
Sponsored Links
Multiply kilocalories by 4.184 to get kilojoules, or enter any energy to convert it.
How to use
- Type the energy you want to convert.
- Choose the units to convert from and to. Use the swap button to flip them.
Sponsored Links
How it works
Every unit is converted through joules using exact definitions: a watt-hour is 3,600 J (one watt for one hour), a kilowatt-hour is 3.6 million J, a food calorie (kilocalorie) is exactly 4,184 J, and a British thermal unit is about 1,055 J. So a 2,000 kcal day is about 8,368 kJ, and 1 kWh is about 860 kcal.
The joule, watt-hour and electronvolt come from the BIPM SI Brochure; the calorie and BTU definitions from NIST Special Publication 811. Food labels in the EU give energy in kJ and kcal with 1 kcal = 4.184 kJ.
Calories come in several versions. This converter uses the thermochemical calorie (4.184 J) used on food labels, and the International Table BTU.
Next you might need
- Fuel economy converterConvert between L/100 km, km/L, miles per gallon (US and imperial) and electric kWh/100 km, mi/kWh., private, runs on your deviceUnit conversionConverterMetricImperialEnergy
- Area converterConvert between square metres, hectares, acres, square feet, square miles and more, exactly., private, runs on your deviceUnit conversionConverterAreaMetricImperial
- Density converterConvert between kg/m³, g/cm³, kg/L, g/L, lb/ft³, lb/in³, oz/in³ and pounds per gallon., private, runs on your deviceUnit conversionConverterWeightVolume & capacityMetricImperial
- Force converterConvert between newtons, kilonewtons, kilogram-force, pound-force, kips, dynes and poundals., private, runs on your deviceUnit conversionConverterMetricImperial
- Length ConverterConvert between metric and imperial lengths, exactly., private, runs on your deviceUnit conversionConverterLengthDistanceMetricImperial
- Pressure converterConvert between pascals, hectopascals, kilopascals, bar, psi, atmospheres, mmHg and inHg., private, runs on your deviceUnit conversionConverterMetricImperial
More in Unit conversion
All 24 utilities in Unit conversion- Temperature ConverterCelsius, Fahrenheit, kelvin, Rankine and oven gas marks, exactly., private, runs on your device
- Angle converterConvert between degrees, radians, gradians, arcminutes, arcseconds, turns and mils., private, runs on your device
- Beaufort wind scaleTurn a wind speed in m/s, km/h, knots or mph into its Beaufort force and name., private, runs on your device
- Cooking converterConvert recipe amounts by ingredient., private, runs on your device
- CSS unit converterConvert CSS lengths between px, rem, em, pt, pc, in, cm, mm and Q at your font size., private, runs on your device
- Data size converterConvert between bytes, kilobytes, megabytes, gigabytes, MiB, GiB and bits, with 1,000 and 1,024 kept apart., private, runs on your device
Popular now
Sponsored Links
Sponsored Links
Sponsored Links