Convert Calories per Second-Square Centimeter-Celsius to Kilocalories per Hour-Square Meter-Celsius

The Calorie per Second-Square Centimeter-Celsius (symbol: cal/(s·cm²·°C)) is a unit of heat transfer coefficient. A CGS-system unit of heat-transfer coefficient equal to exactly 41,840 W/(m²·K) — an extraordinarily large unit appropriate only for the very highest heat-transfer scenarios. Found primarily in: pre-1980s chemistry, thermochemistry, and chemical-engineering literature (Bird-Stewart-Lightfoot 'Transport Phenomena' first edition; McCabe-Smith pre-2008 editions; Soviet / Eastern-European process-engineering documentation that retained CGS units into the 1990s), older heat-exchanger research publications in J. Chem. Eng. Japan and similar, and historical-record industrial data sheets from chemical-plant nameplates installed before the 1970s SI transitions. Reference values in this unit are inconveniently small for most engineering scenarios (typical h values fall in 10⁻⁴ to 10⁻¹ cal/(s·cm²·°C) range) which is part of why W/(m²·K) and BTU/(hr·ft²·°F) displaced it. Most modern engineering has converged on W/(m²·K) (international) or BTU/(hr·ft²·°F) (US domestic). Convert cal/(s·cm²·°C) to W/(m²·K) by multiplying by 41,840.

It belongs to the metric measurement system.

Calories per Second-Square Centimeter-Celsius are commonly used in heat exchanger design, HVAC engineering, and process optimization.

The Kilocalorie per Hour-Square Meter-Celsius (symbol: kcal/(hr·m²·°C)) is a unit of heat transfer coefficient. A legacy metric unit of heat-transfer coefficient equal to exactly 1.163 W/(m²·K). Persists in identifiable contexts: older European engineering literature (especially German DIN-era HVAC handbooks from pre-1980 e.g. Recknagel-Sprenger; French ASHRAE-equivalent French Fluides handbook; Italian process-plant documentation from the 1960s-80s), Russian / Soviet thermodynamic and heat-exchanger documentation that retained metric-calorie units into the post-Soviet transition period, and some older industrial heat-exchanger nameplates still in service in European chemical and refinery facilities (especially East German VEB-era equipment). Numerically convenient because typical convective h values fall in 1-1,000 kcal/(hr·m²·°C) range — a clean three-significant-figure span. Convert kcal/(hr·m²·°C) to W/(m²·K) by multiplying by 1.163; to BTU/(hr·ft²·°F) by multiplying by 0.2048. The unit is officially deprecated under ISO 80000 in favor of W/(m²·K), but remains useful for interpreting and modernizing legacy European technical documentation.

It belongs to the metric measurement system.

Kilocalories per Hour-Square Meter-Celsius are commonly used in heat exchanger design, HVAC engineering, and process optimization.