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Heat Transfer

W/(m·K)toBTU·in/(hr·ft²·°F)

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

Factor1 W/(m·K) = 6.933471 BTU·in/(hr·ft²·°F)

Converter

W/(m·K)

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

Result
6.93347BTU·in/(hr·ft²·°F)

Rendered to 6 significant figures.

Formula

Formula
BTU·in/(hr·ft²·°F) = W/(m·K) × 6.933471

Multiply any value in watts per metre-kelvin by 6.933471 to obtain the value in British thermal unit-inches per hour-square foot-Fahrenheit.

Worked example

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

  1. 01Start with 1 W/(m·K).
  2. 02Multiply by the conversion factor: 1 × 6.933471 = 6.93347 BTU·in/(hr·ft²·°F).
Result1 W/(m·K) = 6.93347 BTU·in/(hr·ft²·°F)

Conversion table

W/(m·K)BTU·in/(hr·ft²·°F)
16.9335
213.867
534.667
1069.335
20138.67
50346.67
100693.35
2001386.7
5003466.7
10006933.5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from W/(m·K) to BTU·in/(hr·ft²·°F)?
1 W/(m·K) equals 6.933471 BTU·in/(hr·ft²·°F). To convert, multiply the value in watts per metre-kelvin by 6.933471.
How do I convert 1 W/(m·K) to BTU·in/(hr·ft²·°F)?
1 W/(m·K) = 6.93347 BTU·in/(hr·ft²·°F). For any value, multiply by 6.933471.
How do I convert BTU·in/(hr·ft²·°F) back to W/(m·K)?
Divide by the same factor — or equivalently, multiply by 0.1442279. So 1 BTU·in/(hr·ft²·°F) = 0.144228 W/(m·K).
When would I need to convert watt per metre-kelvin to British thermal unit-inch per hour-square foot-Fahrenheit?
Thermal conductivity conversions between W/(m·K) and BTU·in/(hr·ft²·°F) 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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