Convert BTU per hour per foot per degree Fahrenheit to Milliwatt per metre kelvin
Convert BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) to Milliwatt per metre kelvin (mW/(m·K)) instantly and accurately.
Conversion Formula
mW/(m·K) = BTU/(h·ft·°F) × 1730.734666
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).
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 hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) | Milliwatt per metre kelvin (mW/(m·K)) |
|---|---|
| 1 BTU/(h·ft·°F) | 1730.73 mW/(m·K) |
| 2 BTU/(h·ft·°F) | 3461.47 mW/(m·K) |
| 5 BTU/(h·ft·°F) | 8653.67 mW/(m·K) |
| 10 BTU/(h·ft·°F) | 17307.3 mW/(m·K) |
| 25 BTU/(h·ft·°F) | 43268.4 mW/(m·K) |
| 50 BTU/(h·ft·°F) | 86536.7 mW/(m·K) |
| 100 BTU/(h·ft·°F) | 173073 mW/(m·K) |