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Heat Transfer

W/(m²·K)tokcal/(hr·m²·°C)

Convert watts per square metre-kelvin (W/(m²·K)) to kilocalories per hour-square metre-Celsius (kcal/(hr·m²·°C)).

Factor1 W/(m²·K) = 0.8598452 kcal/(hr·m²·°C)

Converter

W/(m²·K)

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

Result
85.9845kcal/(hr·m²·°C)

Rendered to 6 significant figures.

Formula

Formula
kcal/(hr·m²·°C) = W/(m²·K) × 0.8598452

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

Worked example

Convert 100 W/(m²·K) to kcal/(hr·m²·°C).

  1. 01Start with 100 W/(m²·K).
  2. 02Multiply by the conversion factor: 100 × 0.8598452 = 85.9845 kcal/(hr·m²·°C).
Result100 W/(m²·K) = 85.9845 kcal/(hr·m²·°C)

Conversion table

W/(m²·K)kcal/(hr·m²·°C)
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/(m²·K) to kcal/(hr·m²·°C)?
1 W/(m²·K) equals 0.8598452 kcal/(hr·m²·°C). To convert, multiply the value in watts per square metre-kelvin by 0.8598452.
How do I convert 1 W/(m²·K) to kcal/(hr·m²·°C)?
1 W/(m²·K) = 0.859845 kcal/(hr·m²·°C). For any value, multiply by 0.8598452.
How do I convert kcal/(hr·m²·°C) back to W/(m²·K)?
Divide by the same factor — or equivalently, multiply by 1.163. So 1 kcal/(hr·m²·°C) = 1.163 W/(m²·K).
When would I need to convert watt per square metre-kelvin to kilocalorie per hour-square metre-Celsius?
Heat-transfer coefficient conversions between W/(m²·K) and kcal/(hr·m²·°C) are needed in heat-exchanger sizing, boiler and condenser design, and HVAC calculations. W/(m²·K) is standard in SI engineering, and BTU/(hr·ft²·°F) is common in US heat-exchanger correlations and vendor literature.
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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