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Thermal Resistance

K/(BTU/h)tomK/W

Convert kelvins per BTU per hour (K/(BTU/h)) to millikelvins per watt (mK/W).

Factor1 K/(BTU/h) = 3412.142 mK/W

Converter

K/(BTU/h)

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

Result
3412.14mK/W

Rendered to 6 significant figures.

Formula

Formula
mK/W = K/(BTU/h) × 3412.142

Multiply any value in kelvins per BTU per hour by 3412.142 to obtain the value in millikelvins per watt.

Worked example

Convert 1 K/(BTU/h) to mK/W.

  1. 01Start with 1 K/(BTU/h).
  2. 02Multiply by the conversion factor: 1 × 3412.142 = 3412.14 mK/W.
Result1 K/(BTU/h) = 3412.14 mK/W

Conversion table

K/(BTU/h)mK/W
13412.1
26824.3
517061
1034121
2068243
501.7061e+5
1003.4121e+5
2006.8243e+5
5001.7061e+6
10003.4121e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from K/(BTU/h) to mK/W?
1 K/(BTU/h) equals 3412.142 mK/W. To convert, multiply the value in kelvins per BTU per hour by 3412.142.
How do I convert 1 K/(BTU/h) to mK/W?
1 K/(BTU/h) = 3412.14 mK/W. For any value, multiply by 3412.142.
How do I convert mK/W back to K/(BTU/h)?
Divide by the same factor — or equivalently, multiply by 0.0002930711. So 1 mK/W = 0.000293071 K/(BTU/h).
When would I need to convert kelvin per BTU per hour to millikelvin per watt?
Thermal-resistance conversions between K/(BTU/h) and mK/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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