Convert BTU inch per hour per square foot per degree Fahrenheit to Kilocalorie per metre per hour per degree Celsius
Convert BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) to Kilocalorie per metre per hour per degree Celsius (kcal/(m·h·°C)) instantly and accurately.
Conversion Formula
kcal/(m·h·°C) = BTU·in/(h·ft²·°F) × 0.124013662
About BTU inch per hour per square foot per degree Fahrenheit
The BTU·in/(h·ft²·°F) equals (1055.05585262 × 0.0254 × 9)/(3600 × 0.09290304 × 5) W/(m·K) ≈0.1442 W/(m·K). The standard US k-factor unit for insulation per ASTM C177, C335, and C518. Mineral wool ≈0.25; expanded polystyrene ≈0.24; polyurethane foam ≈0.14 BTU·in/(h·ft²·°F). 1 BTU·in/(h·ft²·°F) ≈0.1442 W/(m·K).
About Kilocalorie per metre per hour per degree Celsius
The kcal/(m·h·°C) equals exactly 4186.8/3600 W/(m·K) = 1.163 W/(m·K) (1 kcal(IT) = 4186.8 J). Used in pre-SI continental European engineering literature, older DIN/BS standards, and Soviet-era technical documentation. Brick: ≈0.6; dense concrete: ≈1.3; carbon steel: ≈38 kcal/(m·h·°C). 1 kcal/(m·h·°C) = 1.163 W/(m·K).
Quick Reference Table
| BTU inch per hour per square foot per degree Fahrenheit (BTU·in/(h·ft²·°F)) | Kilocalorie per metre per hour per degree Celsius (kcal/(m·h·°C)) |
|---|---|
| 1 BTU·in/(h·ft²·°F) | 0.124014 kcal/(m·h·°C) |
| 2 BTU·in/(h·ft²·°F) | 0.248027 kcal/(m·h·°C) |
| 5 BTU·in/(h·ft²·°F) | 0.620068 kcal/(m·h·°C) |
| 10 BTU·in/(h·ft²·°F) | 1.24014 kcal/(m·h·°C) |
| 25 BTU·in/(h·ft²·°F) | 3.10034 kcal/(m·h·°C) |
| 50 BTU·in/(h·ft²·°F) | 6.20068 kcal/(m·h·°C) |
| 100 BTU·in/(h·ft²·°F) | 12.4014 kcal/(m·h·°C) |