Convert Watts per Square Metre Kelvin to kcal/(h·m²·°C)
1 watt per square metre kelvin (W/(m²·K)) = 0.8598452279 kilocalories per hour square metre degree Celsius (kcal/(h·m²·°C)). 1 kcal/(h·m²·°C) = 1.163 W/(m²·K). Example: 500 W/(m²·K) = 500 × 0.8598452279 = 429.9226139 kcal/(h·m²·°C).
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1 W/(m²·K) = 0.8598452279 kcal/(h·m²·°C)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk watt per square metre kelvin to kilocalorie per hour square metre degree Celsius converter to paste a column from Excel.
How to Convert Watt per Square Metre Kelvin to kcal/(h·m²·°C)
- 1 W/(m²·K) = 0.8598452279 kcal/(h·m²·°C)
- 1 kcal/(h·m²·°C) = 1.163 W/(m²·K)
- Example: convert 500 W/(m²·K) to kcal/(h·m²·°C): 500 W/(m²·K) = 500 × 0.8598452279 kcal/(h·m²·°C) = 429.9226139 kcal/(h·m²·°C)
Reference conditions. kcal/(h·m²·°C): International Table kilocalorie (4186.8 J), as used in engineering heat transfer data
Formula
kcal/(h·m²·°C) = W/(m²·K) × 0.859845227859
or kcal/(h·m²·°C) = W/(m²·K) ÷ 1.163
Derivation from SI units:
- The SI unit of heat transfer coefficient and thermal transmittance (U-value): heat flow (W) per square metre per kelvin
- 1 kcal_IT/(h·m²·°C) = 4186.8 J ÷ (3600 s × 1 m² × 1 K) = 1.163 W/(m²·K) (exact)
Both units are defined exactly, so the factor is exact. Watt per Square Metre Kelvin definition: watt per square metre kelvin; kcal/(h·m²·°C) definition: kilocalorie per hour square metre degree Celsius.
Worked examples
- A coefficient of 500 W/(m²·K) is 429.9226139 kcal/(h·m²·°C).
500 W/(m²·K) × 0.8598452279 = 429.9226139 kcal/(h·m²·°C) - Forced air convection at 25 W/(m²·K) is 21.4961307 kcal/(h·m²·°C).
25 W/(m²·K) × 0.8598452279 = 21.4961307 kcal/(h·m²·°C)
Watt per Square Metre Kelvin to kcal/(h·m²·°C) conversion table
| Watts per Square Metre Kelvin (W/(m²·K)) | kcal/(h·m²·°C) |
|---|---|
| 0.15 W/(m²·K) | 0.1289767842 kcal/(h·m²·°C) |
| 0.25 W/(m²·K) | 0.214961307 kcal/(h·m²·°C) |
| 0.3 W/(m²·K) | 0.2579535684 kcal/(h·m²·°C) |
| 1.4 W/(m²·K) | 1.203783319 kcal/(h·m²·°C) |
| 2.8 W/(m²·K) | 2.407566638 kcal/(h·m²·°C) |
| 5 W/(m²·K) | 4.299226139 kcal/(h·m²·°C) |
| 10 W/(m²·K) | 8.598452279 kcal/(h·m²·°C) |
| 25 W/(m²·K) | 21.4961307 kcal/(h·m²·°C) |
| 100 W/(m²·K) | 85.98452279 kcal/(h·m²·°C) |
| 1000 W/(m²·K) | 859.8452279 kcal/(h·m²·°C) |
| 5000 W/(m²·K) | 4299.226139 kcal/(h·m²·°C) |
Where it's used
SI heat transfer coefficients are converted to kcal/(h·m²·°C) to compare with older metric boiler and heat exchanger tables. Divide by 1.163.
Watt per Square Metre Kelvin to other heat transfer coefficient units
| Conversion | 1 W/(m²·K) equals |
|---|---|
| watt per square metre kelvin to kilocalorie per hour square metre degree Celsius | 0.8598452279 kcal/(h·m²·°C) |
| watt per square metre kelvin to BTU per hour square foot degree Fahrenheit | 0.1761101837 BTU/(h·ft²·°F) |
| watt per square metre kelvin to kilowatt per square metre kelvin | 0.001 kW/(m²·K) |
| watt per square metre kelvin to watt per square centimetre kelvin | 0.0001 W/(cm²·K) |
| watt per square metre kelvin to calorie per second square centimetre degree Celsius | 0.00002390057361 cal/(s·cm²·°C) |
Frequently asked questions
How do I convert W/m²K to kcal/m²h°C?
Divide by 1.163: 500 W/(m²·K) = 429.9226139 kcal/(h·m²·°C).
How many kilocalories per hour square metre degree Celsius are in 1 watt per square metre kelvin?
1 W/(m²·K) = 0.8598452279 kcal/(h·m²·°C).
How do I convert watts per square metre kelvin to kilocalories per hour square metre degree Celsius?
Multiply the value in W/(m²·K) by 0.8598452279, or divide it by 1.163. For example, 500 W/(m²·K) × 0.8598452279 = 429.9226139 kcal/(h·m²·°C).
Is the W/(m²·K) to kcal/(h·m²·°C) conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
- 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: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Watts per Square Metre Kelvin to kcal/(h·m²·°C). Retrieved October 25, 2026, from https://scientificconverters.com/heat-transfer-coefficient/watts-per-square-meter-kelvin-to-kilocalories-per-hour-square-meter-celsius/
IEEE
Scientific Converters, "Convert Watts per Square Metre Kelvin to kcal/(h·m²·°C)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/heat-transfer-coefficient/watts-per-square-meter-kelvin-to-kilocalories-per-hour-square-meter-celsius/