Convert Watt per square metre kelvin to International table BTU per hour per square inch per degree Fahrenheit
Convert Watt per square metre kelvin (W/(m²·K)) to International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·in²·°F) = W/(m²·K) × 0.001222987387
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).
About International table BTU per hour per square inch per degree Fahrenheit
The international table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) equals ≈ 817.67 W/(m²·K) (1 in² = 6.4516×10⁻⁴ m²; 1 °F = 5/9 K). Encountered in US electronics thermal management, semiconductor package datasheets, and heat sink characterisation where contact areas are measured in square inches. 1 BTU(IT)/(h·in²·°F) ≈ 817.67 W/(m²·K).
Quick Reference Table
| Watt per square metre kelvin (W/(m²·K)) | International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) |
|---|---|
| 1 W/(m²·K) | 0.00122299 BTU(IT)/(h·in²·°F) |
| 2 W/(m²·K) | 0.00244597 BTU(IT)/(h·in²·°F) |
| 5 W/(m²·K) | 0.00611494 BTU(IT)/(h·in²·°F) |
| 10 W/(m²·K) | 0.0122299 BTU(IT)/(h·in²·°F) |
| 25 W/(m²·K) | 0.0305747 BTU(IT)/(h·in²·°F) |
| 50 W/(m²·K) | 0.0611494 BTU(IT)/(h·in²·°F) |
| 100 W/(m²·K) | 0.122299 BTU(IT)/(h·in²·°F) |