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Heat Transfer

cal/(cm²·s)toBTU/(hr·ft²)

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

Factor1 cal/(cm²·s) = 13263.21 BTU/(hr·ft²)

Converter

cal/(cm²·s)

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

Result
13263.2BTU/(hr·ft²)

Rendered to 6 significant figures.

Formula

Formula
BTU/(hr·ft²) = cal/(cm²·s) × 13263.21

Multiply any value in calories per square centimetre-second by 13263.21 to obtain the value in British thermal units per hour-square foot.

Worked example

Convert 1 cal/(cm²·s) to BTU/(hr·ft²).

  1. 01Start with 1 cal/(cm²·s).
  2. 02Multiply by the conversion factor: 1 × 13263.21 = 13263.2 BTU/(hr·ft²).
Result1 cal/(cm²·s) = 13263.2 BTU/(hr·ft²)

Conversion table

cal/(cm²·s)BTU/(hr·ft²)
113263
226526
566316
101.3263e+5
202.6526e+5
506.6316e+5
1001.3263e+6
2002.6526e+6
5006.6316e+6
10001.3263e+7

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from cal/(cm²·s) to BTU/(hr·ft²)?
1 cal/(cm²·s) equals 13263.21 BTU/(hr·ft²). To convert, multiply the value in calories per square centimetre-second by 13263.21.
How do I convert 1 cal/(cm²·s) to BTU/(hr·ft²)?
1 cal/(cm²·s) = 13263.2 BTU/(hr·ft²). For any value, multiply by 13263.21.
How do I convert BTU/(hr·ft²) back to cal/(cm²·s)?
Divide by the same factor — or equivalently, multiply by 7.539653e-5. So 1 BTU/(hr·ft²) = 7.53965e-5 cal/(cm²·s).
When would I need to convert calorie per square centimetre-second to British thermal unit per hour-square foot?
Heat-flux conversions between cal/(cm²·s) 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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