Convert Watt per metre degree Celsius to BTU per hour per foot per degree Fahrenheit
Convert Watt per metre degree Celsius (W/(m·°C)) to BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) instantly and accurately.
Conversion Formula
BTU/(h·ft·°F) = W/(m·°C) × 0.5777893165
About Watt per metre degree Celsius
The watt per metre degree Celsius (W/(m·°C)) equals exactly 1 W/(m·K) since temperature intervals 1 °C = 1 K. Widely used in building physics (EN ISO 6946), HVAC engineering, and European material datasheets as an equivalent notation. Stone: ≈2.5 W/(m·°C); softwood timber: ≈0.14 W/(m·°C); glass wool: ≈0.04 W/(m·°C). 1 W/(m·°C) = 1 W/(m·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
| Watt per metre degree Celsius (W/(m·°C)) | BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) |
|---|---|
| 1 W/(m·°C) | 0.577789 BTU/(h·ft·°F) |
| 2 W/(m·°C) | 1.15558 BTU/(h·ft·°F) |
| 5 W/(m·°C) | 2.88895 BTU/(h·ft·°F) |
| 10 W/(m·°C) | 5.77789 BTU/(h·ft·°F) |
| 25 W/(m·°C) | 14.4447 BTU/(h·ft·°F) |
| 50 W/(m·°C) | 28.8895 BTU/(h·ft·°F) |
| 100 W/(m·°C) | 57.7789 BTU/(h·ft·°F) |