Convert BTU per hour per foot per degree Fahrenheit to BTU per second per foot per degree Fahrenheit
Convert BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) to BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) instantly and accurately.
Conversion Formula
BTU/(s·ft·°F) = BTU/(h·ft·°F) × 0.0002777777778
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 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).
Quick Reference Table
| BTU per hour per foot per degree Fahrenheit (BTU/(h·ft·°F)) | BTU per second per foot per degree Fahrenheit (BTU/(s·ft·°F)) |
|---|---|
| 1 BTU/(h·ft·°F) | 0.000277778 BTU/(s·ft·°F) |
| 2 BTU/(h·ft·°F) | 0.000555556 BTU/(s·ft·°F) |
| 5 BTU/(h·ft·°F) | 0.00138889 BTU/(s·ft·°F) |
| 10 BTU/(h·ft·°F) | 0.00277778 BTU/(s·ft·°F) |
| 25 BTU/(h·ft·°F) | 0.00694444 BTU/(s·ft·°F) |
| 50 BTU/(h·ft·°F) | 0.0138889 BTU/(s·ft·°F) |
| 100 BTU/(h·ft·°F) | 0.0277778 BTU/(s·ft·°F) |