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Heat Transfer

kJ/(h·m²·K)tokW/(m²·K)

Convert kilojoules per hour-square metre-kelvin (kJ/(h·m²·K)) to kilowatts per square metre-kelvin (kW/(m²·K)).

Factor1 kJ/(h·m²·K) = 0.0002777778 kW/(m²·K)

Converter

kJ/(h·m²·K)

Accepts numbers or expressions, e.g. 150 + 14.7

Result
2.77778kW/(m²·K)

Rendered to 6 significant figures.

Formula

Formula
kW/(m²·K) = kJ/(h·m²·K) × 0.0002777778

Multiply any value in kilojoules per hour-square metre-kelvin by 0.0002777778 to obtain the value in kilowatts per square metre-kelvin.

Worked example

Convert 10000 kJ/(h·m²·K) to kW/(m²·K).

  1. 01Start with 10000 kJ/(h·m²·K).
  2. 02Multiply by the conversion factor: 10000 × 0.0002777778 = 2.77778 kW/(m²·K).
Result10000 kJ/(h·m²·K) = 2.77778 kW/(m²·K)

Conversion table

kJ/(h·m²·K)kW/(m²·K)
10.00027778
20.00055556
50.0013889
100.0027778
200.0055556
500.013889
1000.027778
2000.055556
5000.13889
10000.27778

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kJ/(h·m²·K) to kW/(m²·K)?
1 kJ/(h·m²·K) equals 0.0002777778 kW/(m²·K). To convert, multiply the value in kilojoules per hour-square metre-kelvin by 0.0002777778.
How do I convert 1 kJ/(h·m²·K) to kW/(m²·K)?
1 kJ/(h·m²·K) = 0.000277778 kW/(m²·K). For any value, multiply by 0.0002777778.
How do I convert kW/(m²·K) back to kJ/(h·m²·K)?
Divide by the same factor — or equivalently, multiply by 3600. So 1 kW/(m²·K) = 3600 kJ/(h·m²·K).
When would I need to convert kilojoule per hour-square metre-kelvin to kilowatt per square metre-kelvin?
Heat-transfer coefficient conversions between kJ/(h·m²·K) and kW/(m²·K) are needed in heat-exchanger sizing, boiler and condenser design, and HVAC calculations. W/(m²·K) is standard in SI engineering, and BTU/(hr·ft²·°F) is common in US heat-exchanger correlations and vendor literature.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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