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Heat Transfer

BTU·in/(hr·ft²·°F)tomW/(m·K)

Convert British thermal unit-inches per hour-square foot-Fahrenheit (BTU·in/(hr·ft²·°F)) to milliwatts per metre-kelvin (mW/(m·K)).

Factor1 BTU·in/(hr·ft²·°F) = 144.2279 mW/(m·K)

Converter

BTU·in/(hr·ft²·°F)

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

Result
144.228mW/(m·K)

Rendered to 6 significant figures.

Formula

Formula
mW/(m·K) = BTU·in/(hr·ft²·°F) × 144.2279

Multiply any value in British thermal unit-inches per hour-square foot-Fahrenheit by 144.2279 to obtain the value in milliwatts per metre-kelvin.

Worked example

Convert 1 BTU·in/(hr·ft²·°F) to mW/(m·K).

  1. 01Start with 1 BTU·in/(hr·ft²·°F).
  2. 02Multiply by the conversion factor: 1 × 144.2279 = 144.228 mW/(m·K).
Result1 BTU·in/(hr·ft²·°F) = 144.228 mW/(m·K)

Conversion table

BTU·in/(hr·ft²·°F)mW/(m·K)
1144.23
2288.46
5721.14
101442.3
202884.6
507211.4
10014423
20028846
50072114
10001.4423e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU·in/(hr·ft²·°F) to mW/(m·K)?
1 BTU·in/(hr·ft²·°F) equals 144.2279 mW/(m·K). To convert, multiply the value in British thermal unit-inches per hour-square foot-Fahrenheit by 144.2279.
How do I convert 1 BTU·in/(hr·ft²·°F) to mW/(m·K)?
1 BTU·in/(hr·ft²·°F) = 144.228 mW/(m·K). For any value, multiply by 144.2279.
How do I convert mW/(m·K) back to BTU·in/(hr·ft²·°F)?
Divide by the same factor — or equivalently, multiply by 0.006933471. So 1 mW/(m·K) = 0.00693347 BTU·in/(hr·ft²·°F).
When would I need to convert British thermal unit-inch per hour-square foot-Fahrenheit to milliwatt per metre-kelvin?
Thermal conductivity conversions between BTU·in/(hr·ft²·°F) and mW/(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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