ppm/°F
part per million per Fahrenheit degree
Thermal expansion coefficientexact by definition
The part per million per Fahrenheit degree is exactly 1.8 × 10⁻⁶ /K, because a Fahrenheit degree is 5/9 of a kelvin so a per-Fahrenheit coefficient must be larger by 9/5 to describe the same material. Steel is 6.5 ppm/°F, the same statement as 11.7 ppm/K.
| 1 ppm/°F | 0.0000018 1/K |
Solvers that use thermal expansion coefficient