Heat Transfer
BTU/(hr·ft²·°F)toW/(m²·K)
Convert British thermal units per hour-square foot-Fahrenheit (BTU/(hr·ft²·°F)) to watts per square metre-kelvin (W/(m²·K)).
Factor1 BTU/(hr·ft²·°F) = 5.678263 W/(m²·K)
Converter
BTU/(hr·ft²·°F)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
W/(m²·K)
Rendered to 6 significant figures.
Formula
Formula
W/(m²·K) = BTU/(hr·ft²·°F) × 5.678263
Multiply any value in British thermal units per hour-square foot-Fahrenheit by 5.678263 to obtain the value in watts per square metre-kelvin.
Worked example
Convert 10 BTU/(hr·ft²·°F) to W/(m²·K).
- 01Start with 10 BTU/(hr·ft²·°F).
- 02Multiply by the conversion factor: 10 × 5.678263 = 56.7826 W/(m²·K).
Result10 BTU/(hr·ft²·°F) = 56.7826 W/(m²·K)
Conversion table
| BTU/(hr·ft²·°F) | W/(m²·K) |
|---|---|
| 1 | 5.6783 |
| 2 | 11.357 |
| 5 | 28.391 |
| 10 | 56.783 |
| 20 | 113.57 |
| 50 | 283.91 |
| 100 | 567.83 |
| 200 | 1135.7 |
| 500 | 2839.1 |
| 1000 | 5678.3 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from BTU/(hr·ft²·°F) to W/(m²·K)?
1 BTU/(hr·ft²·°F) equals 5.678263 W/(m²·K). To convert, multiply the value in British thermal units per hour-square foot-Fahrenheit by 5.678263.
How do I convert 1 BTU/(hr·ft²·°F) to W/(m²·K)?
1 BTU/(hr·ft²·°F) = 5.67826 W/(m²·K). For any value, multiply by 5.678263.
How do I convert W/(m²·K) back to BTU/(hr·ft²·°F)?
Divide by the same factor — or equivalently, multiply by 0.1761102. So 1 W/(m²·K) = 0.17611 BTU/(hr·ft²·°F).
When would I need to convert British thermal unit per hour-square foot-Fahrenheit to watt per square metre-kelvin?
Heat-transfer coefficient conversions between BTU/(hr·ft²·°F) and W/(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).
Related conversions
- W/(m²·K) → BTU/(hr·ft²·°F)watt per square metre-kelvin → British thermal unit per hour-square foot-Fahrenheit
- W/(m²·K) → kW/(m²·K)watt per square metre-kelvin → kilowatt per square metre-kelvin
- kW/(m²·K) → W/(m²·K)kilowatt per square metre-kelvin → watt per square metre-kelvin
- W/(m²·K) → kcal/(hr·m²·°C)watt per square metre-kelvin → kilocalorie per hour-square metre-Celsius
- kcal/(hr·m²·°C) → W/(m²·K)kilocalorie per hour-square metre-Celsius → watt per square metre-kelvin
- W/(m²·K) → cal/(cm²·s·°C)watt per square metre-kelvin → calorie per square centimetre-second-Celsius