Convert BTU per hour per foot per degree Fahrenheit to Microwatt per metre kelvin
Convert BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) to Microwatt per metre kelvin (µW/(m·K)) instantly and accurately.
Conversion Formula
µW/(m·K) = BTU/(h·ft·°F) × 1730734.666
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 Microwatt per metre kelvin
The microwatt per metre kelvin (µW/(m·K)) equals exactly 10⁻⁶ W/(m·K). Used for near-vacuum conditions and evacuated superinsulation systems where the effective thermal conductivity falls well below the mW/(m·K) range. Evacuated multi-layer insulation (MLI) at high vacuum can reach 0.001-10 µW/(m·K) effective conductivity. Completes the SI prefix chain below mW/(m·K). 1 µW/(m·K) = 10⁻⁶ W/(m·K) = 10⁻³ mW/(m·K).
Quick Reference Table
| BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) | Microwatt per metre kelvin (µW/(m·K)) |
|---|---|
| 1 BTU/(h·ft·°F) | 1730730 µW/(m·K) |
| 2 BTU/(h·ft·°F) | 3461470 µW/(m·K) |
| 5 BTU/(h·ft·°F) | 8653670 µW/(m·K) |
| 10 BTU/(h·ft·°F) | 17307300 µW/(m·K) |
| 25 BTU/(h·ft·°F) | 43268400 µW/(m·K) |
| 50 BTU/(h·ft·°F) | 86536700 µW/(m·K) |
| 100 BTU/(h·ft·°F) | 173073000 µW/(m·K) |