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Power and Energy

Jtocal

Convert joules (J) to thermochemical calories (cal).

Factor1 J = 0.2390057 cal

Converter

J

Accepts numbers or expressions, e.g. 150 + 14.7

Result
239.006cal

Rendered to 6 significant figures.

Formula

Formula
cal = J × 0.2390057

Multiply any value in joules by 0.2390057 to obtain the value in thermochemical calories.

Worked example

Convert 1000 J to cal.

  1. 01Start with 1000 J.
  2. 02Multiply by the conversion factor: 1000 × 0.2390057 = 239.006 cal.
Result1000 J = 239.006 cal

Conversion table

Jcal
10.23901
20.47801
51.195
102.3901
204.7801
5011.95
10023.901
20047.801
500119.5
1000239.01

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from J to cal?
1 J equals 0.2390057 cal. To convert, multiply the value in joules by 0.2390057.
How do I convert 1 J to cal?
1 J = 0.239006 cal. For any value, multiply by 0.2390057.
How do I convert cal back to J?
Divide by the same factor — or equivalently, multiply by 4.184. So 1 cal = 4.184 J.
When would I need to convert joule to thermochemical calorie?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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