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Heat Transfer

BTU/(hr·ft²·°F)tokW/(m²·K)

Convert British thermal units per hour-square foot-Fahrenheit (BTU/(hr·ft²·°F)) to kilowatts per square metre-kelvin (kW/(m²·K)).

Factor1 BTU/(hr·ft²·°F) = 0.005678263 kW/(m²·K)

Converter

BTU/(hr·ft²·°F)

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

Result
5.67826kW/(m²·K)

Rendered to 6 significant figures.

Formula

Formula
kW/(m²·K) = BTU/(hr·ft²·°F) × 0.005678263

Multiply any value in British thermal units per hour-square foot-Fahrenheit by 0.005678263 to obtain the value in kilowatts per square metre-kelvin.

Worked example

Convert 1000 BTU/(hr·ft²·°F) to kW/(m²·K).

  1. 01Start with 1000 BTU/(hr·ft²·°F).
  2. 02Multiply by the conversion factor: 1000 × 0.005678263 = 5.67826 kW/(m²·K).
Result1000 BTU/(hr·ft²·°F) = 5.67826 kW/(m²·K)

Conversion table

BTU/(hr·ft²·°F)kW/(m²·K)
10.0056783
20.011357
50.028391
100.056783
200.11357
500.28391
1000.56783
2001.1357
5002.8391
10005.6783

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/(hr·ft²·°F) to kW/(m²·K)?
1 BTU/(hr·ft²·°F) equals 0.005678263 kW/(m²·K). To convert, multiply the value in British thermal units per hour-square foot-Fahrenheit by 0.005678263.
How do I convert 1 BTU/(hr·ft²·°F) to kW/(m²·K)?
1 BTU/(hr·ft²·°F) = 0.00567826 kW/(m²·K). For any value, multiply by 0.005678263.
How do I convert kW/(m²·K) back to BTU/(hr·ft²·°F)?
Divide by the same factor — or equivalently, multiply by 176.1102. So 1 kW/(m²·K) = 176.11 BTU/(hr·ft²·°F).
When would I need to convert British thermal unit per hour-square foot-Fahrenheit to kilowatt per square metre-kelvin?
Heat-transfer coefficient conversions between BTU/(hr·ft²·°F) and kW/(m²·K) 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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