1. Convert to base units
K/W = input value x input unit factor
Every supported thermal resistance unit is stored as a factor relative to kelvin per watt.
Thermodynamics unit converter
Thermal Resistance Unit Converter
Convert thermal resistance units for insulation, electronics cooling, wall assemblies, heat sinks, and heat transfer calculations.
Live thermal resistance conversion
Convert thermal resistance units
Enter a value, choose the starting unit, and select a target unit. The full thermal resistance conversion table updates automatically.
Converted value
All units
Thermal resistance conversion table
Compare the entered value across heat sink, electronics, insulation, and building thermal resistance units.
Common conversions
Useful thermal resistance conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| K/W to C/W | C/W = K/W | Heat sinks and electronics cooling |
| K/W to F hr/BTU | F hr/BTU = K/W x 1.89563 | Imperial heat transfer |
| F hr/BTU to K/W | K/W = F hr/BTU x 0.527528 | SI heat transfer |
| US R-value to RSI | RSI = R x 0.176110184 | Building insulation |
| RSI to US R-value | R = RSI x 5.678263 | Insulation comparison |
| clo to m2 K/W | m2 K/W = clo x 0.155 | Thermal comfort and clothing insulation |
How it works
Thermal resistance conversion method
2. Convert to target units
target value = base value / target unit factor
The selected result and table values are calculated from the same base value.
3. Check precision
rounding depends on scale
Very small and very large values use compact scientific notation to stay readable.
FAQ
Thermal resistance converter questions
Is K/W the same as C/W?
For temperature differences, 1 K/W is numerically equal to 1 C/W.
How do you convert US R-value to RSI?
Multiply US R-value by 0.176110184 to convert to RSI in m2 K/W.
What is thermal resistance?
Thermal resistance measures opposition to heat flow. Higher thermal resistance means less heat flow for a given temperature difference.
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