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Heat Transfer

W/cm²toBTU/(hr·ft²)

Convert watts per square centimetre (W/cm²) to British thermal units per hour-square foot (BTU/(hr·ft²)).

Factor1 W/cm² = 3169.983 BTU/(hr·ft²)

Converter

W/cm²

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

Result
3169.98BTU/(hr·ft²)

Rendered to 6 significant figures.

Formula

Formula
BTU/(hr·ft²) = W/cm² × 3169.983

Multiply any value in watts per square centimetre by 3169.983 to obtain the value in British thermal units per hour-square foot.

Worked example

Convert 1 W/cm² to BTU/(hr·ft²).

  1. 01Start with 1 W/cm².
  2. 02Multiply by the conversion factor: 1 × 3169.983 = 3169.98 BTU/(hr·ft²).
Result1 W/cm² = 3169.98 BTU/(hr·ft²)

Conversion table

W/cm²BTU/(hr·ft²)
13170
26340
515850
1031700
2063400
501.5850e+5
1003.1700e+5
2006.3400e+5
5001.5850e+6
10003.1700e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from W/cm² to BTU/(hr·ft²)?
1 W/cm² equals 3169.983 BTU/(hr·ft²). To convert, multiply the value in watts per square centimetre by 3169.983.
How do I convert 1 W/cm² to BTU/(hr·ft²)?
1 W/cm² = 3169.98 BTU/(hr·ft²). For any value, multiply by 3169.983.
How do I convert BTU/(hr·ft²) back to W/cm²?
Divide by the same factor — or equivalently, multiply by 0.0003154591. So 1 BTU/(hr·ft²) = 0.000315459 W/cm².
When would I need to convert watt per square centimetre to British thermal unit per hour-square foot?
Heat-flux conversions between W/cm² 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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