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Power and Energy

cal/stoW

Convert calories per second (cal/s) to watts (W).

Factor1 cal/s = 4.184 W

Converter

cal/s

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

Result
418.4W

Rendered to 6 significant figures.

Formula

Formula
W = cal/s × 4.184

Multiply any value in calories per second by 4.184 to obtain the value in watts.

Worked example

Convert 100 cal/s to W.

  1. 01Start with 100 cal/s.
  2. 02Multiply by the conversion factor: 100 × 4.184 = 418.4 W.
Result100 cal/s = 418.4 W

Conversion table

cal/sW
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/s to W?
1 cal/s equals 4.184 W. To convert, multiply the value in calories per second by 4.184.
How do I convert 1 cal/s to W?
1 cal/s = 4.184 W. For any value, multiply by 4.184.
How do I convert W back to cal/s?
Divide by the same factor — or equivalently, multiply by 0.2390057. So 1 W = 0.239006 cal/s.
When would I need to convert calorie per second to watt?
Power conversions are common when comparing motor ratings (often kW or hp), thermal duty (BTU/hr or kW), and utility consumption in mixed-unit projects.
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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