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Heat Transfer

W/(m·K)tokcal/(hr·m·K)

Convert watts per metre-kelvin (W/(m·K)) to kilocalories per hour-metre-kelvin (kcal/(hr·m·K)).

Factor1 W/(m·K) = 0.8598452 kcal/(hr·m·K)

Converter

W/(m·K)

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

Result
8.59845kcal/(hr·m·K)

Rendered to 6 significant figures.

Formula

Formula
kcal/(hr·m·K) = W/(m·K) × 0.8598452

Multiply any value in watts per metre-kelvin by 0.8598452 to obtain the value in kilocalories per hour-metre-kelvin.

Worked example

Convert 10 W/(m·K) to kcal/(hr·m·K).

  1. 01Start with 10 W/(m·K).
  2. 02Multiply by the conversion factor: 10 × 0.8598452 = 8.59845 kcal/(hr·m·K).
Result10 W/(m·K) = 8.59845 kcal/(hr·m·K)

Conversion table

W/(m·K)kcal/(hr·m·K)
10.85985
21.7197
54.2992
108.5985
2017.197
5042.992
10085.985
200171.97
500429.92
1000859.85

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from W/(m·K) to kcal/(hr·m·K)?
1 W/(m·K) equals 0.8598452 kcal/(hr·m·K). To convert, multiply the value in watts per metre-kelvin by 0.8598452.
How do I convert 1 W/(m·K) to kcal/(hr·m·K)?
1 W/(m·K) = 0.859845 kcal/(hr·m·K). For any value, multiply by 0.8598452.
How do I convert kcal/(hr·m·K) back to W/(m·K)?
Divide by the same factor — or equivalently, multiply by 1.163. So 1 kcal/(hr·m·K) = 1.163 W/(m·K).
When would I need to convert watt per metre-kelvin to kilocalorie per hour-metre-kelvin?
Thermal conductivity conversions between W/(m·K) and kcal/(hr·m·K) are common in insulation specification, heat-exchanger design, and building-envelope analysis. SI units (W/(m·K)) appear in international standards and simulation tools, while BTU/(hr·ft·°F) is standard in US codes and vendor 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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