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Thermal Resistance

°F·h/BTUtoK/(BTU/h)

Convert Fahrenheit-hours per British thermal unit (°F·h/BTU) to kelvins per BTU per hour (K/(BTU/h)).

Factor1 °F·h/BTU = 0.5555556 K/(BTU/h)

Converter

°F·h/BTU

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

Result
0.555556K/(BTU/h)

Rendered to 6 significant figures.

Formula

Formula
K/(BTU/h) = °F·h/BTU × 0.5555556

Multiply any value in Fahrenheit-hours per British thermal unit by 0.5555556 to obtain the value in kelvins per BTU per hour.

Worked example

Convert 1 °F·h/BTU to K/(BTU/h).

  1. 01Start with 1 °F·h/BTU.
  2. 02Multiply by the conversion factor: 1 × 0.5555556 = 0.555556 K/(BTU/h).
Result1 °F·h/BTU = 0.555556 K/(BTU/h)

Conversion table

°F·h/BTUK/(BTU/h)
10.55556
21.1111
52.7778
105.5556
2011.111
5027.778
10055.556
200111.11
500277.78
1000555.56

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from °F·h/BTU to K/(BTU/h)?
1 °F·h/BTU equals 0.5555556 K/(BTU/h). To convert, multiply the value in Fahrenheit-hours per British thermal unit by 0.5555556.
How do I convert 1 °F·h/BTU to K/(BTU/h)?
1 °F·h/BTU = 0.555556 K/(BTU/h). For any value, multiply by 0.5555556.
How do I convert K/(BTU/h) back to °F·h/BTU?
Divide by the same factor — or equivalently, multiply by 1.8. So 1 K/(BTU/h) = 1.8 °F·h/BTU.
When would I need to convert Fahrenheit-hour per British thermal unit to kelvin per BTU per hour?
Thermal-resistance conversions between °F·h/BTU and K/(BTU/h) 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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