ppm/°F
Parts per million per degree Fahrenheit is the same as microinches per inch per °F (µin/in·°F), the form used in US datasheets. Divide a ppm/K value by 1.8 to get ppm/°F.
Symbol: ppm/°F (ASCII: ppm/F)
Quantity: coefficient of thermal expansion (α, CTE)
SI relation: 1 ppm/°F = 0.0000018 K⁻¹ (exact)
Derivation: 1 ppm/°F = 10⁻⁶ /°F = 1.8 × 10⁻⁶ K⁻¹ = 1 µin/(in·°F)
Exact: yes, by definition
Typical uses
- US material and alloy datasheets
- ASME piping expansion tables
Convert ppm per degree Fahrenheit to other units
| Conversion | 1 ppm/°F equals | Reverse |
|---|---|---|
| ppm per degree Fahrenheit to per kelvin | 0.0000018 K⁻¹ | per kelvin to ppm per degree Fahrenheit |
| ppm per degree Fahrenheit to ppm per kelvin | 1.8 ppm/K | ppm per kelvin to ppm per degree Fahrenheit |
| ppm per degree Fahrenheit to per degree Celsius | 0.0000018 °C⁻¹ | per degree Celsius to ppm per degree Fahrenheit |
| ppm per degree Fahrenheit to per degree Fahrenheit | 0.000001 °F⁻¹ | per degree Fahrenheit to ppm per degree Fahrenheit |
Open the Thermal Expansion Coefficient Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "degree Fahrenheit".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). ppm/°F. Retrieved October 25, 2026, from https://scientificconverters.com/units/ppm-per-degree-fahrenheit/
IEEE
Scientific Converters, "ppm/°F," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/ppm-per-degree-fahrenheit/