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Heat Transfer

kcal/(hr·m²)toBTU/(hr·ft²)

Convert kilocalories per hour-square metre (kcal/(hr·m²)) to British thermal units per hour-square foot (BTU/(hr·ft²)).

Factor1 kcal/(hr·m²) = 0.3686691 BTU/(hr·ft²)

Converter

kcal/(hr·m²)

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

Result
36.8669BTU/(hr·ft²)

Rendered to 6 significant figures.

Formula

Formula
BTU/(hr·ft²) = kcal/(hr·m²) × 0.3686691

Multiply any value in kilocalories per hour-square metre by 0.3686691 to obtain the value in British thermal units per hour-square foot.

Worked example

Convert 100 kcal/(hr·m²) to BTU/(hr·ft²).

  1. 01Start with 100 kcal/(hr·m²).
  2. 02Multiply by the conversion factor: 100 × 0.3686691 = 36.8669 BTU/(hr·ft²).
Result100 kcal/(hr·m²) = 36.8669 BTU/(hr·ft²)

Conversion table

kcal/(hr·m²)BTU/(hr·ft²)
10.36867
20.73734
51.8433
103.6867
207.3734
5018.433
10036.867
20073.734
500184.33
1000368.67

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kcal/(hr·m²) to BTU/(hr·ft²)?
1 kcal/(hr·m²) equals 0.3686691 BTU/(hr·ft²). To convert, multiply the value in kilocalories per hour-square metre by 0.3686691.
How do I convert 1 kcal/(hr·m²) to BTU/(hr·ft²)?
1 kcal/(hr·m²) = 0.368669 BTU/(hr·ft²). For any value, multiply by 0.3686691.
How do I convert BTU/(hr·ft²) back to kcal/(hr·m²)?
Divide by the same factor — or equivalently, multiply by 2.71246. So 1 BTU/(hr·ft²) = 2.71246 kcal/(hr·m²).
When would I need to convert kilocalorie per hour-square metre to British thermal unit per hour-square foot?
Heat-flux conversions between kcal/(hr·m²) and BTU/(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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