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Power and Energy

Wtocal/s

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

Factor1 W = 0.2390057 cal/s

Converter

W

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

Result
23.9006cal/s

Rendered to 6 significant figures.

Formula

Formula
cal/s = W × 0.2390057

Multiply any value in watts by 0.2390057 to obtain the value in calories per second.

Worked example

Convert 100 W to cal/s.

  1. 01Start with 100 W.
  2. 02Multiply by the conversion factor: 100 × 0.2390057 = 23.9006 cal/s.
Result100 W = 23.9006 cal/s

Conversion table

Wcal/s
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 W to cal/s?
1 W equals 0.2390057 cal/s. To convert, multiply the value in watts by 0.2390057.
How do I convert 1 W to cal/s?
1 W = 0.239006 cal/s. For any value, multiply by 0.2390057.
How do I convert cal/s back to W?
Divide by the same factor — or equivalently, multiply by 4.184. So 1 cal/s = 4.184 W.
When would I need to convert watt to calorie per second?
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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