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Heat Transfer

W/m²tocal/(cm²·s)

Convert watts per square metre (W/m²) to calories per square centimetre-second (cal/(cm²·s)).

Factor1 W/m² = 2.390057e-5 cal/(cm²·s)

Converter

W/m²

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

Result
2.39006cal/(cm²·s)

Rendered to 6 significant figures.

Formula

Formula
cal/(cm²·s) = W/m² × 2.390057e-5

Multiply any value in watts per square metre by 2.390057e-5 to obtain the value in calories per square centimetre-second.

Worked example

Convert 100000 W/m² to cal/(cm²·s).

  1. 01Start with 100000 W/m².
  2. 02Multiply by the conversion factor: 100000 × 2.390057e-5 = 2.39006 cal/(cm²·s).
Result100000 W/m² = 2.39006 cal/(cm²·s)

Conversion table

W/m²cal/(cm²·s)
12.3901e-5
24.7801e-5
50.0001195
100.00023901
200.00047801
500.001195
1000.0023901
2000.0047801
5000.01195
10000.023901

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from W/m² to cal/(cm²·s)?
1 W/m² equals 2.390057e-5 cal/(cm²·s). To convert, multiply the value in watts per square metre by 2.390057e-5.
How do I convert 1 W/m² to cal/(cm²·s)?
1 W/m² = 2.39006e-5 cal/(cm²·s). For any value, multiply by 2.390057e-5.
How do I convert cal/(cm²·s) back to W/m²?
Divide by the same factor — or equivalently, multiply by 41840. So 1 cal/(cm²·s) = 41840 W/m².
When would I need to convert watt per square metre to calorie per square centimetre-second?
Heat-flux conversions between W/m² and cal/(cm²·s) appear in radiative-heat-transfer analysis, furnace and reactor design, electronics cooling, and solar-energy calculations. W/m² is the SI standard; BTU/(hr·ft²) and kcal/(hr·m²) appear in US and legacy European datasheets.
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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