Convert kcal/(h·m²·°C) to BTU/(h·ft²·°F)
1 kilocalorie per hour square metre degree Celsius (kcal/(h·m²·°C)) = 0.2048161436 BTU per hour square foot degree Fahrenheit (BTU/(h·ft²·°F)). 1 BTU/(h·ft²·°F) = 4.882427636 kcal/(h·m²·°C). Example: 15 kcal/(h·m²·°C) = 15 × 0.2048161436 = 3.072242154 BTU/(h·ft²·°F).
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1 kcal/(h·m²·°C) = 0.2048161436 BTU/(h·ft²·°F)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilocalorie per hour square metre degree Celsius to BTU per hour square foot degree Fahrenheit converter to paste a column from Excel.
How to Convert kcal/(h·m²·°C) to BTU/(h·ft²·°F)
- 1 kcal/(h·m²·°C) = 0.2048161436 BTU/(h·ft²·°F)
- 1 BTU/(h·ft²·°F) = 4.882427636 kcal/(h·m²·°C)
- Example: convert 15 kcal/(h·m²·°C) to BTU/(h·ft²·°F): 15 kcal/(h·m²·°C) = 15 × 0.2048161436 BTU/(h·ft²·°F) = 3.072242154 BTU/(h·ft²·°F)
Reference conditions. kcal/(h·m²·°C): International Table kilocalorie (4186.8 J), as used in engineering heat transfer data
Formula
BTU/(h·ft²·°F) = kcal/(h·m²·°C) × 0.2048161436225
or BTU/(h·ft²·°F) = kcal/(h·m²·°C) ÷ 4.882427636383
Derivation from SI units:
- 1 kcal_IT/(h·m²·°C) = 4186.8 J ÷ (3600 s × 1 m² × 1 K) = 1.163 W/(m²·K) (exact)
- 1 BTU_IT/(h·ft²·°F) = 1055.05585262 J ÷ (3600 s × 0.09290304 m² × 5/9 K) = 5.678263341 W/(m²·K) (exact)
- 1 kcal/(h·m²·°C) = 1.163 W/(m²·K) ÷ 5.678263341113 W/(m²·K) per BTU/(h·ft²·°F) = 0.2048161436225 BTU/(h·ft²·°F)
Both units are defined exactly, so the factor is exact. kcal/(h·m²·°C) definition: kilocalorie per hour square metre degree Celsius; BTU/(h·ft²·°F) definition: BTU per hour square foot degree Fahrenheit.
Worked examples
- A reading of 20 kcal/(h·m²·°C) converts to 4.096322872 BTU/(h·ft²·°F).
20 kcal/(h·m²·°C) × 0.2048161436 = 4.096322872 BTU/(h·ft²·°F) - A value of 500 kcal/(h·m²·°C) is 102.4080718 BTU/(h·ft²·°F).
500 kcal/(h·m²·°C) × 0.2048161436 = 102.4080718 BTU/(h·ft²·°F)
kcal/(h·m²·°C) to BTU/(h·ft²·°F) conversion table
| kcal/(h·m²·°C) | BTU/(h·ft²·°F) |
|---|---|
| 1 kcal/(h·m²·°C) | 0.2048161436 BTU/(h·ft²·°F) |
| 5 kcal/(h·m²·°C) | 1.024080718 BTU/(h·ft²·°F) |
| 10 kcal/(h·m²·°C) | 2.048161436 BTU/(h·ft²·°F) |
| 20 kcal/(h·m²·°C) | 4.096322872 BTU/(h·ft²·°F) |
| 50 kcal/(h·m²·°C) | 10.24080718 BTU/(h·ft²·°F) |
| 100 kcal/(h·m²·°C) | 20.48161436 BTU/(h·ft²·°F) |
| 500 kcal/(h·m²·°C) | 102.4080718 BTU/(h·ft²·°F) |
| 1000 kcal/(h·m²·°C) | 204.8161436 BTU/(h·ft²·°F) |
| 2000 kcal/(h·m²·°C) | 409.6322872 BTU/(h·ft²·°F) |
| 5000 kcal/(h·m²·°C) | 1024.080718 BTU/(h·ft²·°F) |
Where it's used
kcal/(h·m²·°C) are used for older metric heat exchanger and boiler data, while BTU per hour square foot degree Fahrenheit appear in US window and building U-factors (NFRC, ASHRAE). Both measure heat transfer coefficient (h) and thermal transmittance (U-value), so the conversion is a fixed factor.
kcal/(h·m²·°C) to other heat transfer coefficient units
| Conversion | 1 kcal/(h·m²·°C) equals |
|---|---|
| kilocalorie per hour square metre degree Celsius to BTU per hour square foot degree Fahrenheit | 0.2048161436 BTU/(h·ft²·°F) |
| kilocalorie per hour square metre degree Celsius to watt per square metre kelvin | 1.163 W/(m²·K) |
| kilocalorie per hour square metre degree Celsius to kilowatt per square metre kelvin | 0.001163 kW/(m²·K) |
| kilocalorie per hour square metre degree Celsius to watt per square centimetre kelvin | 0.0001163 W/(cm²·K) |
| kilocalorie per hour square metre degree Celsius to calorie per second square centimetre degree Celsius | 0.00002779636711 cal/(s·cm²·°C) |
Frequently asked questions
How many BTU per hour square foot degree Fahrenheit are in 1 kilocalorie per hour square metre degree Celsius?
1 kcal/(h·m²·°C) = 0.2048161436 BTU/(h·ft²·°F).
How do I convert kilocalories per hour square metre degree Celsius to BTU per hour square foot degree Fahrenheit?
Multiply the value in kcal/(h·m²·°C) by 0.2048161436, or divide it by 4.882427636. For example, 15 kcal/(h·m²·°C) × 0.2048161436 = 3.072242154 BTU/(h·ft²·°F).
Is the kcal/(h·m²·°C) to BTU/(h·ft²·°F) conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilocalorie_IT".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "British thermal unit_IT per hour square foot degree Fahrenheit [Btu_IT/(h · ft² · °F)]".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert kcal/(h·m²·°C) to BTU/(h·ft²·°F). Retrieved October 25, 2026, from https://scientificconverters.com/heat-transfer-coefficient/kilocalories-per-hour-square-meter-celsius-to-btu-per-hour-square-foot-fahrenheit/
IEEE
Scientific Converters, "Convert kcal/(h·m²·°C) to BTU/(h·ft²·°F)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/heat-transfer-coefficient/kilocalories-per-hour-square-meter-celsius-to-btu-per-hour-square-foot-fahrenheit/