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Heat Transfer

kcal/(hr·m²·°C)toBTU/(hr·ft²·°F)

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

Factor1 kcal/(hr·m²·°C) = 0.2048161 BTU/(hr·ft²·°F)

Converter

kcal/(hr·m²·°C)

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

Result
2.04816BTU/(hr·ft²·°F)

Rendered to 6 significant figures.

Formula

Formula
BTU/(hr·ft²·°F) = kcal/(hr·m²·°C) × 0.2048161

Multiply any value in kilocalories per hour-square metre-Celsius by 0.2048161 to obtain the value in British thermal units per hour-square foot-Fahrenheit.

Worked example

Convert 10 kcal/(hr·m²·°C) to BTU/(hr·ft²·°F).

  1. 01Start with 10 kcal/(hr·m²·°C).
  2. 02Multiply by the conversion factor: 10 × 0.2048161 = 2.04816 BTU/(hr·ft²·°F).
Result10 kcal/(hr·m²·°C) = 2.04816 BTU/(hr·ft²·°F)

Conversion table

kcal/(hr·m²·°C)BTU/(hr·ft²·°F)
10.20482
20.40963
51.0241
102.0482
204.0963
5010.241
10020.482
20040.963
500102.41
1000204.82

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from kcal/(hr·m²·°C) to BTU/(hr·ft²·°F)?
1 kcal/(hr·m²·°C) equals 0.2048161 BTU/(hr·ft²·°F). To convert, multiply the value in kilocalories per hour-square metre-Celsius by 0.2048161.
How do I convert 1 kcal/(hr·m²·°C) to BTU/(hr·ft²·°F)?
1 kcal/(hr·m²·°C) = 0.204816 BTU/(hr·ft²·°F). For any value, multiply by 0.2048161.
How do I convert BTU/(hr·ft²·°F) back to kcal/(hr·m²·°C)?
Divide by the same factor — or equivalently, multiply by 4.882428. So 1 BTU/(hr·ft²·°F) = 4.88243 kcal/(hr·m²·°C).
When would I need to convert kilocalorie per hour-square metre-Celsius to British thermal unit per hour-square foot-Fahrenheit?
Heat-transfer coefficient conversions between kcal/(hr·m²·°C) and BTU/(hr·ft²·°F) 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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