Convert Milliwatt per metre kelvin to BTU inch per hour per square foot per degree Fahrenheit
Convert Milliwatt per metre kelvin (mW/(m·K)) to BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) instantly and accurately.
Conversion Formula
BTU·in/(h·ft²·°F) = mW/(m·K) × 0.006933471799
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 inch per hour per square foot per degree Fahrenheit
The BTU·in/(h·ft²·°F) equals (1055.05585262 × 0.0254 × 9)/(3600 × 0.09290304 × 5) W/(m·K) ≈0.1442 W/(m·K). The standard US k-factor unit for insulation per ASTM C177, C335, and C518. Mineral wool ≈0.25; expanded polystyrene ≈0.24; polyurethane foam ≈0.14 BTU·in/(h·ft²·°F). 1 BTU·in/(h·ft²·°F) ≈0.1442 W/(m·K).
Quick Reference Table
| Milliwatt per metre kelvin (mW/(m·K)) | BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) |
|---|---|
| 1 mW/(m·K) | 0.00693347 BTU·in/(h·ft²·°F) |
| 2 mW/(m·K) | 0.0138669 BTU·in/(h·ft²·°F) |
| 5 mW/(m·K) | 0.0346674 BTU·in/(h·ft²·°F) |
| 10 mW/(m·K) | 0.0693347 BTU·in/(h·ft²·°F) |
| 25 mW/(m·K) | 0.173337 BTU·in/(h·ft²·°F) |
| 50 mW/(m·K) | 0.346674 BTU·in/(h·ft²·°F) |
| 100 mW/(m·K) | 0.693347 BTU·in/(h·ft²·°F) |