1. Convert to base units
W/(m K) = input value x input unit factor
Every supported thermal conductivity unit is stored as a factor relative to watts per meter kelvin.
Thermodynamics unit converter
Thermal Conductivity Unit Converter
Convert thermal conductivity units for insulation, heat transfer, materials, fluids, HVAC, and thermal design calculations.
Live thermal conductivity conversion
Convert thermal conductivity units
Enter a value, choose the starting unit, and select a target unit. The full thermal conductivity conversion table updates automatically.
Converted value
All units
Thermal conductivity conversion table
Compare the entered value across SI, metric, imperial, insulation, and heat-transfer conductivity units.
Common conversions
Useful thermal conductivity conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| W/m K to BTU/hr ft F | BTU/hr ft F = W/m K x 0.577789 | Imperial heat-transfer data |
| BTU/hr ft F to W/m K | W/m K = BTU/hr ft F x 1.730735 | SI thermal calculations |
| W/m K to BTU in/hr ft2 F | BTU in/hr ft2 F = W/m K x 6.93347 | Insulation and R-value data |
| kcal/hr m C to W/m K | W/m K = kcal/hr m C x 1.163 | Legacy thermal references |
| W/cm K to W/m K | W/m K = W/cm K x 100 | High-conductivity materials |
| mW/m K to W/m K | W/m K = mW/m K / 1000 | Low-conductivity materials |
How it works
Thermal conductivity 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 conductivity converter questions
How do you convert W/m K to BTU/hr ft F?
Multiply W/m K by about 0.577789 to convert to BTU/(hr ft F).
How do you convert BTU/hr ft F to W/m K?
Multiply BTU/(hr ft F) by about 1.730735 to convert to W/(m K).
What does thermal conductivity measure?
Thermal conductivity measures how readily heat flows through a material for a temperature gradient.
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