Convert BTU·in/(h·ft²·°F) to kcal/(h·m·°C)
1 BTU inch per hour square foot degree Fahrenheit (BTU·in/(h·ft²·°F)) = 0.124013662 kilocalories per hour metre degree Celsius (kcal/(h·m·°C)). 1 kcal/(h·m·°C) = 8.063627702 BTU·in/(h·ft²·°F). Example: 15 BTU·in/(h·ft²·°F) = 15 × 0.124013662 = 1.860204929 kcal/(h·m·°C).
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1 BTU·in/(h·ft²·°F) = 0.124013662 kcal/(h·m·°C)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk BTU inch per hour square foot degree Fahrenheit to kilocalorie per hour metre degree Celsius converter to paste a column from Excel.
How to Convert BTU·in/(h·ft²·°F) to kcal/(h·m·°C)
- 1 BTU·in/(h·ft²·°F) = 0.124013662 kcal/(h·m·°C)
- 1 kcal/(h·m·°C) = 8.063627702 BTU·in/(h·ft²·°F)
- Example: convert 15 BTU·in/(h·ft²·°F) to kcal/(h·m·°C): 15 BTU·in/(h·ft²·°F) = 15 × 0.124013662 kcal/(h·m·°C) = 1.860204929 kcal/(h·m·°C)
Reference conditions. kcal/(h·m·°C): International Table kilocalorie (4186.8 J), as used in engineering heat transfer data
Formula
kcal/(h·m·°C) = BTU·in/(h·ft²·°F) × 0.1240136619641
or kcal/(h·m·°C) = BTU·in/(h·ft²·°F) ÷ 8.063627701674
Derivation from SI units:
- 1 BTU_IT·in/(h·ft²·°F) = 1055.05585262 J × 0.0254 m ÷ (3600 s × 0.09290304 m² × 5/9 K) = 0.1442278889 W/(m·K) (exact)
- 1 kcal_IT/(h·m·°C) = 4186.8 J ÷ (3600 s × 1 m × 1 K) = 1.163 W/(m·K) (exact)
- 1 BTU·in/(h·ft²·°F) = 0.1442278888643 W/(m·K) ÷ 1.163 W/(m·K) per kcal/(h·m·°C) = 0.1240136619641 kcal/(h·m·°C)
Both units are defined exactly, so the factor is exact. BTU·in/(h·ft²·°F) definition: BTU inch per hour square foot degree Fahrenheit; kcal/(h·m·°C) definition: kilocalorie per hour metre degree Celsius.
Worked examples
- A reading of 0.22 BTU·in/(h·ft²·°F) converts to 0.02728300563 kcal/(h·m·°C).
0.22 BTU·in/(h·ft²·°F) × 0.124013662 = 0.02728300563 kcal/(h·m·°C) - A value of 0.3 BTU·in/(h·ft²·°F) is 0.03720409859 kcal/(h·m·°C).
0.3 BTU·in/(h·ft²·°F) × 0.124013662 = 0.03720409859 kcal/(h·m·°C)
BTU·in/(h·ft²·°F) to kcal/(h·m·°C) conversion table
| BTU·in/(h·ft²·°F) | kcal/(h·m·°C) |
|---|---|
| 0.15 BTU·in/(h·ft²·°F) | 0.01860204929 kcal/(h·m·°C) |
| 0.16 BTU·in/(h·ft²·°F) | 0.01984218591 kcal/(h·m·°C) |
| 0.2 BTU·in/(h·ft²·°F) | 0.02480273239 kcal/(h·m·°C) |
| 0.22 BTU·in/(h·ft²·°F) | 0.02728300563 kcal/(h·m·°C) |
| 0.25 BTU·in/(h·ft²·°F) | 0.03100341549 kcal/(h·m·°C) |
| 0.27 BTU·in/(h·ft²·°F) | 0.03348368873 kcal/(h·m·°C) |
| 0.3 BTU·in/(h·ft²·°F) | 0.03720409859 kcal/(h·m·°C) |
| 0.5 BTU·in/(h·ft²·°F) | 0.06200683098 kcal/(h·m·°C) |
| 1 BTU·in/(h·ft²·°F) | 0.124013662 kcal/(h·m·°C) |
| 5 BTU·in/(h·ft²·°F) | 0.6200683098 kcal/(h·m·°C) |
Where it's used
BTU·in/(h·ft²·°F) are used for US insulation k-values (ASTM C177, C518), while kilocalories per hour metre degree Celsius appear in older metric heat transfer and insulation tables. Both measure thermal conductivity (k, λ), so the conversion is a fixed factor.
BTU·in/(h·ft²·°F) to other thermal conductivity units
| Conversion | 1 BTU·in/(h·ft²·°F) equals |
|---|---|
| BTU inch per hour square foot degree Fahrenheit to kilocalorie per hour metre degree Celsius | 0.124013662 kcal/(h·m·°C) |
| BTU inch per hour square foot degree Fahrenheit to watt per metre kelvin | 0.1442278889 W/(m·K) |
| BTU inch per hour square foot degree Fahrenheit to BTU per hour foot degree Fahrenheit | 0.08333333333 BTU/(h·ft·°F) |
| BTU inch per hour square foot degree Fahrenheit to milliwatt per metre kelvin | 144.2278889 mW/(m·K) |
| BTU inch per hour square foot degree Fahrenheit to watt per centimetre kelvin | 0.001442278889 W/(cm·K) |
| BTU inch per hour square foot degree Fahrenheit to calorie per second centimetre degree Celsius | 0.0003447129275 cal/(s·cm·°C) |
Frequently asked questions
How many kilocalories per hour metre degree Celsius are in 1 BTU inch per hour square foot degree Fahrenheit?
1 BTU·in/(h·ft²·°F) = 0.124013662 kcal/(h·m·°C).
How do I convert BTU inch per hour square foot degree Fahrenheit to kilocalories per hour metre degree Celsius?
Multiply the value in BTU·in/(h·ft²·°F) by 0.124013662, or divide it by 8.063627702. For example, 15 BTU·in/(h·ft²·°F) × 0.124013662 = 1.860204929 kcal/(h·m·°C).
Is the BTU·in/(h·ft²·°F) to kcal/(h·m·°C) 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, "British thermal unit_IT inch per hour square foot degree Fahrenheit [Btu_IT · in/(h · ft² · °F)]".
- 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".
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 BTU·in/(h·ft²·°F) to kcal/(h·m·°C). Retrieved October 25, 2026, from https://scientificconverters.com/thermal-conductivity/btu-inch-per-hour-square-foot-fahrenheit-to-kilocalories-per-hour-meter-celsius/
IEEE
Scientific Converters, "Convert BTU·in/(h·ft²·°F) to kcal/(h·m·°C)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/thermal-conductivity/btu-inch-per-hour-square-foot-fahrenheit-to-kilocalories-per-hour-meter-celsius/