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Heat Transfer

BTU/(hr·ft²·°F)tocal/(cm²·s·°C)

Convert British thermal units per hour-square foot-Fahrenheit (BTU/(hr·ft²·°F)) to calories per square centimetre-second-Celsius (cal/(cm²·s·°C)).

Factor1 BTU/(hr·ft²·°F) = 0.0001357138 cal/(cm²·s·°C)

Converter

BTU/(hr·ft²·°F)

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

Result
0.135714cal/(cm²·s·°C)

Rendered to 6 significant figures.

Formula

Formula
cal/(cm²·s·°C) = BTU/(hr·ft²·°F) × 0.0001357138

Multiply any value in British thermal units per hour-square foot-Fahrenheit by 0.0001357138 to obtain the value in calories per square centimetre-second-Celsius.

Worked example

Convert 1000 BTU/(hr·ft²·°F) to cal/(cm²·s·°C).

  1. 01Start with 1000 BTU/(hr·ft²·°F).
  2. 02Multiply by the conversion factor: 1000 × 0.0001357138 = 0.135714 cal/(cm²·s·°C).
Result1000 BTU/(hr·ft²·°F) = 0.135714 cal/(cm²·s·°C)

Conversion table

BTU/(hr·ft²·°F)cal/(cm²·s·°C)
10.00013571
20.00027143
50.00067857
100.0013571
200.0027143
500.0067857
1000.013571
2000.027143
5000.067857
10000.13571

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from BTU/(hr·ft²·°F) to cal/(cm²·s·°C)?
1 BTU/(hr·ft²·°F) equals 0.0001357138 cal/(cm²·s·°C). To convert, multiply the value in British thermal units per hour-square foot-Fahrenheit by 0.0001357138.
How do I convert 1 BTU/(hr·ft²·°F) to cal/(cm²·s·°C)?
1 BTU/(hr·ft²·°F) = 0.000135714 cal/(cm²·s·°C). For any value, multiply by 0.0001357138.
How do I convert cal/(cm²·s·°C) back to BTU/(hr·ft²·°F)?
Divide by the same factor — or equivalently, multiply by 7368.45. So 1 cal/(cm²·s·°C) = 7368.45 BTU/(hr·ft²·°F).
When would I need to convert British thermal unit per hour-square foot-Fahrenheit to calorie per square centimetre-second-Celsius?
Heat-transfer coefficient conversions between BTU/(hr·ft²·°F) and cal/(cm²·s·°C) 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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