Convert cal/(s·cm²·°C) to kcal/(h·m²·°C)

Formula

kcal/(h·m²·°C) = cal/(s·cm²·°C) × 35975.92433362

Derivation from SI units:

• 1 cal_th/(s·cm²·°C) = 4.184 J ÷ (1 s × 10⁻⁴ m² × 1 K) = 41 840 W/(m²·K) (exact)
• 1 kcal_IT/(h·m²·°C) = 4186.8 J ÷ (3600 s × 1 m² × 1 K) = 1.163 W/(m²·K) (exact)
• 1 cal/(s·cm²·°C) = 41840 W/(m²·K) ÷ 1.163 W/(m²·K) per kcal/(h·m²·°C) = 35975.92433362 kcal/(h·m²·°C)

Both units are defined exactly, so the factor is exact. cal/(s·cm²·°C) definition: calorie per second square centimetre degree Celsius; kcal/(h·m²·°C) definition: kilocalorie per hour square metre degree Celsius.

Worked examples

1. A reading of 0.001 cal/(s·cm²·°C) converts to 35.97592433 kcal/(h·m²·°C).
   0.001 cal/(s·cm²·°C) × 35975.92433 = 35.97592433 kcal/(h·m²·°C)
2. A value of 0.05 cal/(s·cm²·°C) is 1798.796217 kcal/(h·m²·°C).
   0.05 cal/(s·cm²·°C) × 35975.92433 = 1798.796217 kcal/(h·m²·°C)

Where it's used

cal/(s·cm²·°C) are used for older scientific and metallurgical literature, while kilocalories per hour square metre degree Celsius appear in older metric heat exchanger and boiler data. Both measure heat transfer coefficient (h) and thermal transmittance (U-value), so the conversion is a fixed factor.

cal/(s·cm²·°C) to other heat transfer coefficient units

Frequently asked questions

Sources

• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "calorie_th".
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilocalorie_IT".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.