Convert International table BTU per second per square foot to Thermochemical calorie per second per square centimetre
Convert International table BTU per second per square foot (BTU(IT)/(s·ft²)) to Thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) instantly and accurately.
Conversion Formula
cal(th)/(s·cm²) = BTU(IT)/(s·ft²) × 0.271427502
About International table BTU per second per square foot
The international table BTU per second per square foot (BTU(IT)/(s·ft²)) equals 1055.05585262/0.09290304 ≈ 11357 W/m² (= 3600 × BTU(IT)/(h·ft²)). Used for extreme heat flux: atmospheric re-entry aerodynamic heating, solid rocket nozzle throat, and nuclear reactor thermal hydraulics design. 1 BTU(IT)/(s·ft²) ≈ 11357 W/m².
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.
Quick Reference Table
| International table BTU per second per square foot (BTU(IT)/(s·ft²)) | Thermochemical calorie per second per square centimetre (cal(th)/(s·cm²)) |
|---|---|
| 1 BTU(IT)/(s·ft²) | 0.271428 cal(th)/(s·cm²) |
| 2 BTU(IT)/(s·ft²) | 0.542855 cal(th)/(s·cm²) |
| 5 BTU(IT)/(s·ft²) | 1.35714 cal(th)/(s·cm²) |
| 10 BTU(IT)/(s·ft²) | 2.71428 cal(th)/(s·cm²) |
| 25 BTU(IT)/(s·ft²) | 6.78569 cal(th)/(s·cm²) |
| 50 BTU(IT)/(s·ft²) | 13.5714 cal(th)/(s·cm²) |
| 100 BTU(IT)/(s·ft²) | 27.1428 cal(th)/(s·cm²) |