Thermal Expansion Converter
Enter a value below to convert between metric, imperial, and standard thermal expansion units.
Convert Thermal Expansion
Enter a value and select the units to convert between per kelvin (1/k), per degree celsius (1/°c), and per degree fahrenheit (1/°f).
You can change the units using the dropdowns above or click on a unit button.
Common Thermal Expansion Reference Points
Here are some common thermal expansion values in Length/Length per Kelvin (1/K), Length/Length per Degree Celsius (1/°C), and Length/Length per Degree Fahrenheit (1/°F). Click any preset value or arrow to load it into the converter.
| Description | Length/Length per Kelvin (1/K) | Length/Length per Degree Celsius (1/°C) | Length/Length per Degree Fahrenheit (1/°F) |
|---|---|---|---|
| 1 length/length per kelvin unit | 1 | 1 | 0.55556 |
| 5 per kelvin (1/k) | 5 | 5 | 2.77778 |
| 10 per kelvin (1/k) benchmark | 10 | 10 | 5.55556 |
| 25 per kelvin (1/k) | 25 | 25 | 13.88889 |
| 50 per kelvin (1/k) | 50 | 50 | 27.77778 |
| 100 per kelvin (1/k) reference | 100 | 100 | 55.55556 |
Thermal Expansion Conversion Formulas
Use the following formulas to convert between per kelvin (1/k), per degree celsius (1/°c), and per degree fahrenheit (1/°f).
All thermal expansion conversions are anchored to the international SI base unit (Length/Length per Kelvin) for full scientific and engineering accuracy.
More Length/Length per Kelvin & Length/Length per Degree Celsius Conversions
Convert from Per Kelvin
Convert to Per Degree Celsius
Frequently Asked Questions
All Thermal Expansion Conversion Calculators (6)
Select any dedicated thermal expansion pair below for worked examples and printable tables
Category Conversion Matrix
Simultaneous comparison of 5 units in this category
Thermal Expansion Unit Definitions & Symbols
Length/Length per Kelvin (1/K)
SISI fractional thermal expansion per kelvin.
Length/Length per Degree Celsius (1/°C)
METRICFractional thermal expansion per degree Celsius.
Length/Length per Degree Fahrenheit (1/°F)
US CUSTOMARYFractional expansion per °F (1/°F = 1.8 × 1/°C).
Micrometer per Meter-Kelvin (ppm/K) (ppm/K)
METRICEngineering thermal expansion unit (10⁻⁶ /K).
Microinch per Inch-°F (ppm/°F) (ppm/°F)
US CUSTOMARYUS engineering expansion unit (1.8×10⁻⁶ /K).
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