Per degree Fahrenheit (1/°F)
Relative change in size per degree Fahrenheit: 1.8 per kelvin, because a degree Fahrenheit is 5/9 K.
What is a reciprocal degree Fahrenheit?
- Symbol
- 1/°F
- Quantity
- Thermal Expansion
- Unit system
- US customary
- Definition
- Relative change in size per degree Fahrenheit: 1.8 per kelvin, because a degree Fahrenheit is 5/9 K.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used in US engineering data for expansion of metals, pipes and building materials.
Per degree Fahrenheit in other thermal expansion units
- 1 1/°F = 1.8 1/KPer kelvin
- 1 1/°F = 1.8 1/°CPer degree Celsius
- 1 1/°F = 1800000 ppm/KPart per million per kelvin
- 1 1/°F = 1000000 ppm/°FPart per million per degree Fahrenheit
Per degree Fahrenheit quick reference
| Per degree Fahrenheit | Part per million per kelvin | Part per million per degree Fahrenheit | Per kelvin |
|---|---|---|---|
| 1 1/°F | = 1800000 ppm/K | = 1000000 ppm/°F | = 1.8 1/K |
| 10 1/°F | = 18000000 ppm/K | = 10000000 ppm/°F | = 18 1/K |
| 100 1/°F | = 180000000 ppm/K | = 100000000 ppm/°F | = 180 1/K |
| 1000 1/°F | = 1800000000 ppm/K | = 1000000000 ppm/°F | = 1800 1/K |
Where the reciprocal degree Fahrenheit fits
The next smaller thermal expansion unit is the reciprocal kelvin (1/K). 1 1/°F = 1.8 1/K, and 1 1/K ≈ 0.5555555556 1/°F.
Frequently asked questions
- How many parts per million per kelvin are in one reciprocal degree Fahrenheit?
- One reciprocal degree Fahrenheit = 1800000 ppm/K (parts per million per kelvin).
- How many parts per million per degree Fahrenheit are in one reciprocal degree Fahrenheit?
- One reciprocal degree Fahrenheit = 1000000 ppm/°F (parts per million per degree Fahrenheit).
- How many reciprocal kelvins are in one reciprocal degree Fahrenheit?
- One reciprocal degree Fahrenheit = 1.8 1/K (reciprocal kelvins).