Convert BTU per second per foot per degree Fahrenheit to Milliwatt per metre kelvin
Convert BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) to Milliwatt per metre kelvin (mW/(m·K)) instantly and accurately.
Conversion Formula
mW/(m·K) = BTU/(s·ft·°F) × 6230644.799
About BTU per second per foot per degree Fahrenheit
The BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) equals (1055.05585262 × 9)/(0.3048 × 5) W/(m·K) ≈6230.6 W/(m·K). Equal to 3600 × BTU/(h·ft·°F). Reserved for extremely high-power transient applications in US engineering literature; copper ≈0.0617; carbon steel ≈0.0072 BTU/(s·ft·°F). 1 BTU/(s·ft·°F) = 3600 BTU/(h·ft·°F) ≈6230.6 W/(m·K).
About Milliwatt per metre kelvin
The milliwatt per metre kelvin (mW/(m·K)) equals exactly 10⁻³ W/(m·K). Used for gases and ultra-low thermal conductivity solids: still air ≈26 mW/(m·K), CO₂ ≈16 mW/(m·K), aerogels 12-20 mW/(m·K), vacuum insulation panels ≈5 mW/(m·K). Standard insulation products are typically specified in mW/(m·K). 1 mW/(m·K) = 10⁻³ W/(m·K) = 0.1 mW/(cm·K).
Quick Reference Table
| BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) | Milliwatt per metre kelvin (mW/(m·K)) |
|---|---|
| 1 BTU/(s·ft·°F) | 6230640 mW/(m·K) |
| 2 BTU/(s·ft·°F) | 12461300 mW/(m·K) |
| 5 BTU/(s·ft·°F) | 31153200 mW/(m·K) |
| 10 BTU/(s·ft·°F) | 62306400 mW/(m·K) |
| 25 BTU/(s·ft·°F) | 155766000 mW/(m·K) |
| 50 BTU/(s·ft·°F) | 311532000 mW/(m·K) |
| 100 BTU/(s·ft·°F) | 623064000 mW/(m·K) |