Which thermal resistance units are supported?

The converter supports K/W, °C/W, and °F·h/BTU (IT).

Are K/W and °C/W equivalent?

Yes. A temperature difference of 1 K equals a temperature difference of 1 °C, so the numerical values are the same.

How is °F·h/BTU converted to K/W?

One °F·h/BTU (IT) equals 1.8956342 K/W.

Can I enter a negative value?

No. The thermal resistance value must be non-negative.

How many decimal places can the result use?

You can set the result to between 0 and 10 decimal places.

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Thermal Resistance Converter (K/W / °C/W / °F·h/BTU)

Convert thermal resistance between K/W (kelvin per watt, SI base), °C/W (1 = 1 K/W, since Δ1 K = Δ1 °C exactly), and °F·h/BTU International Table (1 = 1.8956342 K/W). Converts via K/W to the target unit and lists the equivalent value in all three units for reference. Reference values: CPU heatsink ≈ 0.1–0.3, LED thermal path ≈ 5–20, natural convection ≈ 1 K/W.

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2 examples

CPU heatsink: 0.5 K/W → °F·h/BTU ≈ 0.263764, °C/W = 0.5

0.5 K/W ÷ 1.8956342 = 0.263764 °F·h/BTU (IT). °C/W stays 0.5 because Δ1 K = Δ1 °C. Typical mid-range CPU heatsink.

{"result":"0.5 K/W = 0.263764 °F·h/BTU (IT). All units: K/W=0.5, °C/W=0.5, °F·h/BTU (IT)=0.263764.","metadata":{"input":{"inputUnit":"K/W","value":0.5,"outputUnit":"°F·h/BTU (IT)"},"result":{"outputValue":0.263764,"outputUnit":"°F·h/BTU (IT)","KW":0.5,"CW":0.5,"FBTU":0.263764}}}

LED thermal path: 10 °F·h/BTU → K/W ≈ 18.956342

10 °F·h/BTU (IT) × 1.8956342 = 18.956342 K/W = 18.956342 °C/W. High thermal-resistance LED path.

{"result":"10 °F·h/BTU (IT) = 18.956342 K/W. All units: K/W=18.956342, °C/W=18.956342, °F·h/BTU (IT)=10.","metadata":{"input":{"inputUnit":"°F·h/BTU (IT)","value":10,"outputUnit":"K/W"},"result":{"outputValue":18.956342,"outputUnit":"K/W","KW":18.956342,"CW":18.956342,"FBTU":10}}}

Inputs

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4 options

SettingsAdjust formats, ranges, numbers, and modes.4

Input unitselectOptionalValuenumberRequiredThermal resistance in the selected Input unit. Must be non-negative.Output unitselectOptionalDecimal PlacesnumberOptional

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Samples

Thermal Resistance Converter (K/W / °C/W / °F·h/BTU)

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Examples

1. Convert a CPU heatsink rating to °F·h/BTU

2. Convert an LED thermal path to K/W

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