Convert BTU per hour per foot per degree Fahrenheit to Milliwatt per metre degree Celsius
Convert BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) to Milliwatt per metre degree Celsius (mW/(m·°C)) instantly and accurately.
Conversion Formula
mW/(m·°C) = 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 degree Celsius
The milliwatt per metre degree Celsius (mW/(m·°C)) equals exactly 1 mW/(m·K) = 10⁻³ W/(m·K) since temperature intervals 1 °C = 1 K. Used interchangeably with mW/(m·K) in building physics, insulation standards (EN ISO 10456), and material datasheets where Celsius is the preferred temperature scale. Still air ≈26 mW/(m·°C); mineral wool ≈35 mW/(m·°C). 1 mW/(m·°C) = 1 mW/(m·K) = 10⁻³ W/(m·K).
Quick Reference Table
| BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) | Milliwatt per metre degree Celsius (mW/(m·°C)) |
|---|---|
| 1 BTU/(h·ft·°F) | 1730.73 mW/(m·°C) |
| 2 BTU/(h·ft·°F) | 3461.47 mW/(m·°C) |
| 5 BTU/(h·ft·°F) | 8653.67 mW/(m·°C) |
| 10 BTU/(h·ft·°F) | 17307.3 mW/(m·°C) |
| 25 BTU/(h·ft·°F) | 43268.4 mW/(m·°C) |
| 50 BTU/(h·ft·°F) | 86536.7 mW/(m·°C) |
| 100 BTU/(h·ft·°F) | 173073 mW/(m·°C) |