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Heat Transfer

W/m²tokW/m²

Convert watts per square metre (W/m²) to kilowatts per square metre (kW/m²).

Factor1 W/m² = 0.001 kW/m²

Converter

W/m²

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

Result
1kW/m²

Rendered to 6 significant figures.

Formula

Formula
kW/m² = W/m² × 0.001

Multiply any value in watts per square metre by 0.001 to obtain the value in kilowatts per square metre.

Worked example

Convert 1000 W/m² to kW/m².

  1. 01Start with 1000 W/m².
  2. 02Multiply by the conversion factor: 1000 × 0.001 = 1 kW/m².
Result1000 W/m² = 1 kW/m²

Conversion table

W/m²kW/m²
10.001
20.002
50.005
100.01
200.02
500.05
1000.1
2000.2
5000.5
10001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from W/m² to kW/m²?
1 W/m² equals 0.001 kW/m². To convert, multiply the value in watts per square metre by 0.001.
How do I convert 1 W/m² to kW/m²?
1 W/m² = 0.001 kW/m². For any value, multiply by 0.001.
How do I convert kW/m² back to W/m²?
Divide by the same factor — or equivalently, multiply by 1000. So 1 kW/m² = 1000 W/m².
When would I need to convert watt per square metre to kilowatt per square metre?
Heat-flux conversions between W/m² and kW/m² appear in radiative-heat-transfer analysis, furnace and reactor design, electronics cooling, and solar-energy calculations. W/m² is the SI standard; BTU/(hr·ft²) and kcal/(hr·m²) appear in US and legacy European datasheets.
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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