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Power and Energy

caltoJ

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

Factor1 cal = 4.184 J

Converter

cal

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

Result
4184J

Rendered to 6 significant figures.

Formula

Formula
J = cal × 4.184

Multiply any value in thermochemical calories by 4.184 to obtain the value in joules.

Worked example

Convert 1000 cal to J.

  1. 01Start with 1000 cal.
  2. 02Multiply by the conversion factor: 1000 × 4.184 = 4184 J.
Result1000 cal = 4184 J

Conversion table

calJ
14.184
28.368
520.92
1041.84
2083.68
50209.2
100418.4
200836.8
5002092
10004184

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from cal to J?
1 cal equals 4.184 J. To convert, multiply the value in thermochemical calories by 4.184.
How do I convert 1 cal to J?
1 cal = 4.184 J. For any value, multiply by 4.184.
How do I convert J back to cal?
Divide by the same factor — or equivalently, multiply by 0.2390057. So 1 J = 0.239006 cal.
When would I need to convert thermochemical calorie to joule?
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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