Thermal Expansion Converter

From
To
Sig. figures:

Per Kelvin

K⁻¹

0.000012

Per Celsius degree

°C⁻¹

0.000012

Parts per million per Kelvin

ppm/K

12(input)

Parts per million per °C

ppm/°C

12

μm per m per Kelvin

μm/(m·K)

12

μm per m per °C

μm/(m·°C)

12

mm per m per Kelvin

mm/(m·K)

0.012

nm per m per Kelvin

nm/(m·K)

12000

Per Fahrenheit degree

°F⁻¹

0.00000666667

Per Rankine degree

°R⁻¹

0.00000666667

Parts per million per °F

ppm/°F

6.66667

μin per in per °F

μin/(in·°F)

6.66667

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Convert coefficient of thermal expansion (α) across SI and Imperial units - K⁻¹, °C⁻¹, ppm/K, μm/(m·K), mm/(m·K), nm/(m·K), °F⁻¹, °R⁻¹, ppm/°F, μin/(in·°F). Material reference: Al 23 ppm/K, steel 12, Cu 17, Invar 1.2, glass 3.3 ppm/K. 100% browser-based.

How to Use

  1. 1Type a thermal expansion coefficient value (e.g. 12 for steel ppm/K)
  2. 2Select your starting unit from the From dropdown (e.g. ppm/K, μm/(m·K))
  3. 3Select your target unit from the To dropdown - the result appears instantly
  4. 4All conversions appear simultaneously across SI and Imperial groups
  5. 5Hover any result row to reveal copy and use-as-input buttons
  6. 6Click ⇄ to swap From/To units
  7. 7Adjust Sig. figures (3–12) for required precision
  8. 8Toggle Sci notation for very small values (nm/(m·K))
  9. 9Open 'Material reference values' for common CTE values

Features

  • 12 thermal-expansion coefficient units across SI and Imperial
  • Groups: SI/Metric and Imperial
  • Includes ppm/K, μm/(m·K), nm/(m·K), °F⁻¹, ppm/°F, μin/(in·°F)
  • Adjustable significant figures and scientific notation toggle
  • Material reference: Al, steel, Cu, Invar, glass
  • 100% browser-based

Frequently Asked Questions

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