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Thermal Resistance

K/(BTU/h)to°F·h/BTU

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

Factor1 K/(BTU/h) = 1.8 °F·h/BTU

Converter

K/(BTU/h)

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

Result
1.8°F·h/BTU

Rendered to 6 significant figures.

Formula

Formula
°F·h/BTU = K/(BTU/h) × 1.8

Multiply any value in kelvins per BTU per hour by 1.8 to obtain the value in Fahrenheit-hours per British thermal unit.

Worked example

Convert 1 K/(BTU/h) to °F·h/BTU.

  1. 01Start with 1 K/(BTU/h).
  2. 02Multiply by the conversion factor: 1 × 1.8 = 1.8 °F·h/BTU.
Result1 K/(BTU/h) = 1.8 °F·h/BTU

Conversion table

K/(BTU/h)°F·h/BTU
11.8
23.6
59
1018
2036
5090
100180
200360
500900
10001800

Reference values rounded to 5 significant figures for display.

FAQ

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