Heat Transfer Coefficient Converter

Convert between all heat transfer coefficient units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: watt per square metre kelvin (W/(m²·K))

Conversion Formula

About Heat Transfer Coefficient Units

Common Heat Transfer Coefficient Conversions

• 1 W/(m²·K) = 1 J/(s·m²·K) (exact); SI coherent unit - used in all modern heat transfer standards and textbooks
• 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K); 1 W/(m²·K) ≈ 0.17611 BTU(IT)/(h·ft²·°F)
• 1 CHU/(h·ft²·°C) = 1 BTU(IT)/(h·ft²·°F) ≈ 5.6783 W/(m²·K) (exact: °F/°C and CHU/BTU ratios cancel)
• 1 kcal(th)/(h·m²·°C) = 4184/3600 ≈ 1.1622 W/(m²·K) (exact: 1 kcal(th) = 4184 J)
• 1 kW/(m²·K) = 1000 W/(m²·K) = 0.1 W/(cm²·K); 1 W/(cm²·K) = 10⁴ W/(m²·K)
• 1 cal(th)/(s·cm²·°C) = 41840 W/(m²·K) (exact: 1 cal(th) = 4.184 J; 1 cm² = 10^-4 m²)
• 1 kcal(IT)/(h·cm²·°C) = 11630 W/(m²·K) exactly (4186.8/0.36); used in boiler tube tables
• Typical values: still air ≈ 5-25 W/(m²·K); forced water ≈ 200-10 000 W/(m²·K); nucleate boiling up to 100 000 W/(m²·K)

Direct Converters