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Heat Transfer

BTU/(hr·ft²)tokBTU/(hr·ft²)

Convert British thermal units per hour-square foot (BTU/(hr·ft²)) to kilo-British thermal units per hour-square foot (kBTU/(hr·ft²)).

Factor1 BTU/(hr·ft²) = 0.001 kBTU/(hr·ft²)

Converter

BTU/(hr·ft²)

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

Result
1kBTU/(hr·ft²)

Rendered to 6 significant figures.

Formula

Formula
kBTU/(hr·ft²) = BTU/(hr·ft²) × 0.001

Multiply any value in British thermal units per hour-square foot by 0.001 to obtain the value in kilo-British thermal units per hour-square foot.

Worked example

Convert 1000 BTU/(hr·ft²) to kBTU/(hr·ft²).

  1. 01Start with 1000 BTU/(hr·ft²).
  2. 02Multiply by the conversion factor: 1000 × 0.001 = 1 kBTU/(hr·ft²).
Result1000 BTU/(hr·ft²) = 1 kBTU/(hr·ft²)

Conversion table

BTU/(hr·ft²)kBTU/(hr·ft²)
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 BTU/(hr·ft²) to kBTU/(hr·ft²)?
1 BTU/(hr·ft²) equals 0.001 kBTU/(hr·ft²). To convert, multiply the value in British thermal units per hour-square foot by 0.001.
How do I convert 1 BTU/(hr·ft²) to kBTU/(hr·ft²)?
1 BTU/(hr·ft²) = 0.001 kBTU/(hr·ft²). For any value, multiply by 0.001.
How do I convert kBTU/(hr·ft²) back to BTU/(hr·ft²)?
Divide by the same factor — or equivalently, multiply by 1000. So 1 kBTU/(hr·ft²) = 1000 BTU/(hr·ft²).
When would I need to convert British thermal unit per hour-square foot to kilo-British thermal unit per hour-square foot?
Heat-flux conversions between BTU/(hr·ft²) and kBTU/(hr·ft²) 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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