Thermal Resistance Converter
Enter a value below to convert between metric, imperial, and standard thermal resistance units.
Convert Thermal Resistance
Enter a value and select the units to convert between kelvins per watt, degrees celsius per watt, and degree fahrenheit hours per btu.
You can change the units using the dropdowns above or click on a unit button.
Common Thermal Resistance Reference Points
Here are some common thermal resistance values in Kelvin per Watt (K/W), Degree Celsius per Watt (°C/W), and Degree Fahrenheit Hour per BTU (°F·h/BTU). Click any preset value or arrow to load it into the converter.
| Description | Kelvin per Watt (K/W) | Degree Celsius per Watt (°C/W) | Degree Fahrenheit Hour per BTU (°F·h/BTU) |
|---|---|---|---|
| 1 kelvin per watt unit | 1 | 1 | 0.52753 |
| 5 kelvins per watt | 5 | 5 | 2.63764 |
| 10 kelvins per watt benchmark | 10 | 10 | 5.27528 |
| 25 kelvins per watt | 25 | 25 | 13.1882 |
| 50 kelvins per watt | 50 | 50 | 26.3764 |
| 100 kelvins per watt reference | 100 | 100 | 52.75279 |
Thermal Resistance Conversion Formulas
Use the following formulas to convert between kelvins per watt, degrees celsius per watt, and degree fahrenheit hours per btu.
All thermal resistance conversions are anchored to the international SI base unit (Kelvin per Watt) for full scientific and engineering accuracy.
More Kelvin per Watt & Degree Celsius per Watt Conversions
Convert from Kelvins per Watt
Convert to Degrees Celsius per Watt
Frequently Asked Questions
All Thermal Resistance Conversion Calculators (6)
Select any dedicated thermal resistance pair below for worked examples and printable tables
Category Conversion Matrix
Simultaneous comparison of 4 units in this category
Thermal Resistance Unit Definitions & Symbols
Kelvin per Watt (K/W)
SISI unit of absolute thermal resistance.
Degree Celsius per Watt (°C/W)
METRICElectronics heatsink thermal resistance unit (1 °C/W = 1 K/W).
Degree Fahrenheit Hour per BTU (°F·h/BTU)
US CUSTOMARYUS thermal resistance unit (≈ 1.8956 K/W).
Degree Fahrenheit Second per BTU (°F·s/BTU)
US CUSTOMARYEqual to 1/3600 °F·h/BTU.
References
- [1]NIST HB 133 StandardNIST (NIST HB 133 / SP 811)·Checking the Net Contents of Packaged Goods, Handbook 133 - 2019 Edition & NIST SP 811
- [2]BIPM SI BrochureBIPM (BIPM SI-9)·The International System of Units (SI Brochure, 9th Edition)
- [3]NIST SP 811 Appendix B.9NIST SP 811 (NIST SP 811 App. B.9)·NIST Guide to the SI, Appendix B.9: Factors for Units Listed by Kind of Quantity or Field of Science