Convert International table BTU per second per square foot per degree Fahrenheit to Milliwatt per square metre kelvin
Convert International table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) to Milliwatt per square metre kelvin (mW/(m²·K)) instantly and accurately.
Conversion Formula
mW/(m²·K) = BTU(IT)/(s·ft²·°F) × 20441748.03
About International table BTU per second per square foot per degree Fahrenheit
The international table BTU per second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) equals ≈ 20442 W/(m²·K) (= 3600 × BTU(IT)/(h·ft²·°F)). Encountered in atmospheric re-entry aerodynamic heating analysis, solid rocket motor nozzle throat design, and nuclear reactor thermal-hydraulics with peak surface heat transfer rates. 1 BTU(IT)/(s·ft²·°F) ≈ 20442 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 second per square foot per degree Fahrenheit (BTU(IT)/(s·ft²·°F)) | Milliwatt per square metre kelvin (mW/(m²·K)) |
|---|---|
| 1 BTU(IT)/(s·ft²·°F) | 20441700 mW/(m²·K) |
| 2 BTU(IT)/(s·ft²·°F) | 40883500 mW/(m²·K) |
| 5 BTU(IT)/(s·ft²·°F) | 102209000 mW/(m²·K) |
| 10 BTU(IT)/(s·ft²·°F) | 204417000 mW/(m²·K) |
| 25 BTU(IT)/(s·ft²·°F) | 511044000 mW/(m²·K) |
| 50 BTU(IT)/(s·ft²·°F) | 1.022 × 109 mW/(m²·K) |
| 100 BTU(IT)/(s·ft²·°F) | 2.044 × 109 mW/(m²·K) |