Convert International table BTU per hour per square inch per degree Fahrenheit to Milliwatt per square metre kelvin
Convert International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) to Milliwatt per square metre kelvin (mW/(m²·K)) instantly and accurately.
Conversion Formula
mW/(m²·K) = BTU(IT)/(h·in²·°F) × 817669.9211
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).
About Milliwatt per square metre kelvin
The milliwatt per square metre kelvin (mW/(m²·K)) equals 10⁻³ W/(m²·K). Used in thermal characterization of advanced superinsulation panels and cryogenic multilayer insulation (MLI) in space applications, where effective heat transfer coefficients as low as 0.5-5 mW/(m²·K) are achieved in high-vacuum multilayer systems. 1 mW/(m²·K) = 10⁻³ W/(m²·K).
Quick Reference Table
| International table BTU per hour per square inch per degree Fahrenheit (BTU(IT)/(h·in²·°F)) | Milliwatt per square metre kelvin (mW/(m²·K)) |
|---|---|
| 1 BTU(IT)/(h·in²·°F) | 817670 mW/(m²·K) |
| 2 BTU(IT)/(h·in²·°F) | 1635340 mW/(m²·K) |
| 5 BTU(IT)/(h·in²·°F) | 4088350 mW/(m²·K) |
| 10 BTU(IT)/(h·in²·°F) | 8176700 mW/(m²·K) |
| 25 BTU(IT)/(h·in²·°F) | 20441700 mW/(m²·K) |
| 50 BTU(IT)/(h·in²·°F) | 40883500 mW/(m²·K) |
| 100 BTU(IT)/(h·in²·°F) | 81767000 mW/(m²·K) |