Thermal Conductivity Unit Converter
W/m·K ↔ BTU and kcal forms — datasheet languages unified.
US insulation sheets love BTU·in (note the INCH); structural tables use BTU·ft — a factor-of-12 trap that has ruined more than one thermal model.
Formula
Thermal Conductivity Unit Converter is a free thermal conductivity conversion for design engineers, metallurgists and QA inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Thermal Conductivity Unit Converter
W/m·K ↔ BTU and kcal forms — datasheet languages unified. The calculation implements 1 W/m·K = 0.5778 BTU·ft/h·ft²·°F = 6.933 BTU·in/h·ft²·°F (NIST SP 811). US insulation sheets love BTU·in (note the INCH); structural tables use BTU·ft — a factor-of-12 trap that has ruined more than one thermal model.
How to use Thermal Conductivity Unit Converter
- 1Enter Thermal conductivity in W/m·K.
- 2Read BTU·ft/(h·ft²·°F), BTU·in/(h·ft²·°F), kcal/(m·h·°C) instantly — no submit button needed.
Why use Thermal Conductivity Unit Converter?
- ✓Implements the standard formula — 1 W/m·K = 0.5778 BTU·ft/h·ft²·°F = 6.933 BTU·in/h·ft²·°F
- ✓Reference cited on-page: NIST SP 811
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Thermal Conductivity Unit Converter use?+
It computes 1 W/m·K = 0.5778 BTU·ft/h·ft²·°F = 6.933 BTU·in/h·ft²·°F, per NIST SP 811. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
US insulation sheets love BTU·in (note the INCH); structural tables use BTU·ft — a factor-of-12 trap that has ruined more than one thermal model.
Where do the material property defaults come from?+
Defaults are standard handbook values (ASM, manufacturer datasheets, the cited standard). Always substitute certified values from your material's test certificate for critical work.
Is the Thermal Conductivity Unit Converter free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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