Convert Thermochemical calorie per second per square centimetre to International table BTU per hour per square foot
Convert Thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) to International table BTU per hour per square foot (BTU(IT)/(h·ft²)) instantly and accurately.
Conversion Formula
BTU(IT)/(h·ft²) = cal(th)/(s·cm²) × 13263.21015
About Thermochemical calorie per second per square centimetre
The thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) equals exactly 41840 W/m² (1 cal(th) = 4.184 J; 1 cm² = 10⁻⁴ m²). The CGS unit for very high heat flux: ablation heat flux during atmospheric re-entry ≈ 1-100 cal/(s·cm²). Used in plasma physics and aerospace thermal protection. 1 cal(th)/(s·cm²) = 41840 W/m².
About International table BTU per hour per square foot
The international table BTU per hour per square foot (BTU(IT)/(h·ft²)) equals 1055.05585262/(3600×0.09290304) ≈ 3.15459 W/m². The standard US heat flux unit in ASHRAE, ASTM, and building codes for thermal resistance (R-value), boiler ratings, and heat exchanger design. 1 BTU(IT)/(h·ft²) ≈ 3.15459 W/m².
Quick Reference Table
| Thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) | International table BTU per hour per square foot (BTU(IT)/(h·ft²)) |
|---|---|
| 1 cal(th)/(s·cm²) | 13263.2 BTU(IT)/(h·ft²) |
| 2 cal(th)/(s·cm²) | 26526.4 BTU(IT)/(h·ft²) |
| 5 cal(th)/(s·cm²) | 66316.1 BTU(IT)/(h·ft²) |
| 10 cal(th)/(s·cm²) | 132632 BTU(IT)/(h·ft²) |
| 25 cal(th)/(s·cm²) | 331580 BTU(IT)/(h·ft²) |
| 50 cal(th)/(s·cm²) | 663161 BTU(IT)/(h·ft²) |
| 100 cal(th)/(s·cm²) | 1326320 BTU(IT)/(h·ft²) |