Convert BTU per second per foot per degree Fahrenheit to Watt per metre kelvin
Convert BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) to Watt per metre kelvin (W/(m·K)) instantly and accurately.
Conversion Formula
W/(m·K) = BTU/(s·ft·°F) × 6230.644799
About BTU per second per foot per degree Fahrenheit
The BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) equals (1055.05585262 × 9)/(0.3048 × 5) W/(m·K) ≈6230.6 W/(m·K). Equal to 3600 × BTU/(h·ft·°F). Reserved for extremely high-power transient applications in US engineering literature; copper ≈0.0617; carbon steel ≈0.0072 BTU/(s·ft·°F). 1 BTU/(s·ft·°F) = 3600 BTU/(h·ft·°F) ≈6230.6 W/(m·K).
About Watt per metre kelvin
The watt per metre kelvin (W/(m·K)) is the SI unit for thermal conductivity defined by Fourier's law q = -λ∇T. Materials span orders of magnitude: aerogels ≈0.015, glass ≈1.0, stainless steel ≈16, aluminium ≈205, copper ≈385, diamond ≈2200 W/(m·K). Referenced in ISO 22007, EN 12667, and all major international standards. 1 W/(m·K) = 1 W/(m·°C).
Quick Reference Table
| BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) | Watt per metre kelvin (W/(m·K)) |
|---|---|
| 1 BTU/(s·ft·°F) | 6230.64 W/(m·K) |
| 2 BTU/(s·ft·°F) | 12461.3 W/(m·K) |
| 5 BTU/(s·ft·°F) | 31153.2 W/(m·K) |
| 10 BTU/(s·ft·°F) | 62306.4 W/(m·K) |
| 25 BTU/(s·ft·°F) | 155766 W/(m·K) |
| 50 BTU/(s·ft·°F) | 311532 W/(m·K) |
| 100 BTU/(s·ft·°F) | 623064 W/(m·K) |