Convert Celsius Heat Unit per hour per square foot per degree Celsius to Watt per square metre kelvin
Convert Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) to Watt per square metre kelvin (W/(m²·K)) instantly and accurately.
Conversion Formula
W/(m²·K) = CHU/(h·ft²·°C) × 5.678263341
About Celsius Heat Unit per hour per square foot per degree Celsius
The Celsius heat unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) equals ≈ 5.6783 W/(m²·K) - numerically identical to BTU(IT)/(h·ft²·°F). Used in UK and Canadian steam and process engineering; the temperature-interval ratio °F/°C = 5/9 is exactly compensated by the energy ratio CHU/BTU(IT) = 9/5, making both units numerically equal. 1 CHU/(h·ft²·°C) = 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K).
About Watt per square metre kelvin
The watt per square metre kelvin (W/(m²·K)) is the SI coherent unit for heat transfer coefficient (ISO 80000-5). Typical values: free convection in still air 2-25 W/(m²·K), forced-air cooling 25-250 W/(m²·K), natural water convection 200-1000 W/(m²·K), forced water up to 10 000 W/(m²·K), nucleate boiling up to 100 000 W/(m²·K). 1 W/(m²·K) = 1 J/(s·m²·K).
Quick Reference Table
| Celsius Heat Unit per hour per square foot per degree Celsius (CHU/(h·ft²·°C)) | Watt per square metre kelvin (W/(m²·K)) |
|---|---|
| 1 CHU/(h·ft²·°C) | 5.67826 W/(m²·K) |
| 2 CHU/(h·ft²·°C) | 11.3565 W/(m²·K) |
| 5 CHU/(h·ft²·°C) | 28.3913 W/(m²·K) |
| 10 CHU/(h·ft²·°C) | 56.7826 W/(m²·K) |
| 25 CHU/(h·ft²·°C) | 141.957 W/(m²·K) |
| 50 CHU/(h·ft²·°C) | 283.913 W/(m²·K) |
| 100 CHU/(h·ft²·°C) | 567.826 W/(m²·K) |