Convert Milliwatt per metre kelvin to BTU per hour per foot per degree Fahrenheit
Convert Milliwatt per metre kelvin (mW/(m·K)) to BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) instantly and accurately.
Conversion Formula
BTU/(h·ft·°F) = mW/(m·K) × 0.0005777893165
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).
About BTU per hour per foot per degree Fahrenheit
The BTU/(h·ft·°F) equals (1055.05585262 × 9)/(3600 × 0.3048 × 5) W/(m·K) ≈1.7307 W/(m·K). Standard US thermal conductivity unit in ASHRAE Handbook and ASTM C1045. Copper: ≈223; carbon steel: ≈26; brick: ≈0.44; glass fibre insulation: ≈0.025 BTU/(h·ft·°F). 1 BTU/(h·ft·°F) = 12 BTU·in/(h·ft²·°F) ≈1.7307 W/(m·K).
Quick Reference Table
| Milliwatt per metre kelvin (mW/(m·K)) | BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) |
|---|---|
| 1 mW/(m·K) | 0.000577789 BTU/(h·ft·°F) |
| 2 mW/(m·K) | 0.00115558 BTU/(h·ft·°F) |
| 5 mW/(m·K) | 0.00288895 BTU/(h·ft·°F) |
| 10 mW/(m·K) | 0.00577789 BTU/(h·ft·°F) |
| 25 mW/(m·K) | 0.0144447 BTU/(h·ft·°F) |
| 50 mW/(m·K) | 0.0288895 BTU/(h·ft·°F) |
| 100 mW/(m·K) | 0.0577789 BTU/(h·ft·°F) |