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Thermal Resistance

K/(BTU/h)to°F·s/BTU

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

Factor1 K/(BTU/h) = 6480 °F·s/BTU

Converter

K/(BTU/h)

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

Result
6480°F·s/BTU

Rendered to 6 significant figures.

Formula

Formula
°F·s/BTU = K/(BTU/h) × 6480

Multiply any value in kelvins per BTU per hour by 6480 to obtain the value in Fahrenheit-seconds per British thermal unit.

Worked example

Convert 1 K/(BTU/h) to °F·s/BTU.

  1. 01Start with 1 K/(BTU/h).
  2. 02Multiply by the conversion factor: 1 × 6480 = 6480 °F·s/BTU.
Result1 K/(BTU/h) = 6480 °F·s/BTU

Conversion table

K/(BTU/h)°F·s/BTU
16480
212960
532400
1064800
201.2960e+5
503.2400e+5
1006.4800e+5
2001.2960e+6
5003.2400e+6
10006.4800e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from K/(BTU/h) to °F·s/BTU?
1 K/(BTU/h) equals 6480 °F·s/BTU. To convert, multiply the value in kelvins per BTU per hour by 6480.
How do I convert 1 K/(BTU/h) to °F·s/BTU?
1 K/(BTU/h) = 6480 °F·s/BTU. For any value, multiply by 6480.
How do I convert °F·s/BTU back to K/(BTU/h)?
Divide by the same factor — or equivalently, multiply by 0.000154321. So 1 °F·s/BTU = 0.000154321 K/(BTU/h).
When would I need to convert kelvin per BTU per hour to Fahrenheit-second per British thermal unit?
Thermal-resistance conversions between K/(BTU/h) and °F·s/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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