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Thermal Resistance

°F·h/BTUto°C/W

Convert Fahrenheit-hours per British thermal unit (°F·h/BTU) to degrees Celsius per watt (°C/W).

Factor1 °F·h/BTU = 1.895634 °C/W

Converter

°F·h/BTU

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

Result
1.89563°C/W

Rendered to 6 significant figures.

Formula

Formula
°C/W = °F·h/BTU × 1.895634

Multiply any value in Fahrenheit-hours per British thermal unit by 1.895634 to obtain the value in degrees Celsius per watt.

Worked example

Convert 1 °F·h/BTU to °C/W.

  1. 01Start with 1 °F·h/BTU.
  2. 02Multiply by the conversion factor: 1 × 1.895634 = 1.89563 °C/W.
Result1 °F·h/BTU = 1.89563 °C/W

Conversion table

°F·h/BTU°C/W
11.8956
23.7913
59.4782
1018.956
2037.913
5094.782
100189.56
200379.13
500947.82
10001895.6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from °F·h/BTU to °C/W?
1 °F·h/BTU equals 1.895634 °C/W. To convert, multiply the value in Fahrenheit-hours per British thermal unit by 1.895634.
How do I convert 1 °F·h/BTU to °C/W?
1 °F·h/BTU = 1.89563 °C/W. For any value, multiply by 1.895634.
How do I convert °C/W back to °F·h/BTU?
Divide by the same factor — or equivalently, multiply by 0.5275279. So 1 °C/W = 0.527528 °F·h/BTU.
When would I need to convert Fahrenheit-hour per British thermal unit to degree Celsius per watt?
Thermal-resistance conversions between °F·h/BTU and °C/W appear in electronics cooling (heat-sink and TIM datasheets), transformer, motor and generator thermal-rise calculations, lumped-element R-C thermal-network modelling, and transient heat-transfer analysis. K/W and °C/W are the SI standard; mK/W and µK/W cover sub-SI heat-sink and TIM datasheet ladders; K/kW and K/MW cover large-equipment and power-plant notation; °F·h/BTU and °F·s/BTU are the US convention. This category is lumped thermal resistance only — it does NOT include area-normalized R-value (m²·K/W), thermal-conductivity inverse with geometry, or U-value calculations, all of which are different physical quantities.
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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