Convert Per Degree Celsius to ppm/°F (°C⁻¹ to ppm/°F)
1 per degree Celsius (°C⁻¹) = 555555.5556 ppm per degree Fahrenheit (ppm/°F). 1 ppm/°F = 0.0000018 °C⁻¹. Example: 15 °C⁻¹ = 15 × 555555.5556 = 8333333.333 ppm/°F.
Also searched as per degree Celsius to ppm/°F, per degree Celsius in ppm/°F, per degree Celsius into ppm per degree Fahrenheit, °C⁻¹ to ppm/°F, °C⁻¹ in ppm per degree Fahrenheit, °C⁻¹ into ppm per degree Fahrenheit, per degree Celsius to ppm per degree Fahrenheit, °C⁻¹ to ppm per degree Fahrenheit converter and how many ppm per degree Fahrenheit in a per degree Celsius.
1 °C⁻¹ = 555555.5556 ppm/°F
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk per degree Celsius to ppm per degree Fahrenheit converter to paste a column from Excel.
How to Convert Per Degree Celsius to ppm/°F
- 1 °C⁻¹ = 555555.5556 ppm/°F
- 1 ppm/°F = 0.0000018 °C⁻¹
- Example: convert 15 °C⁻¹ to ppm/°F: 15 °C⁻¹ = 15 × 555555.5556 ppm/°F = 8333333.333 ppm/°F
Formula
ppm/°F = °C⁻¹ × 555555.5555556
Derivation from SI units:
- 1/°C = 1/K, because a temperature difference of 1 °C equals 1 K
- 1 ppm/°F = 10⁻⁶ /°F = 1.8 × 10⁻⁶ K⁻¹ = 1 µin/(in·°F)
- 1 °C⁻¹ = 1 K⁻¹ ÷ 0.0000018 K⁻¹ per ppm/°F = 555555.5555556 ppm/°F
Both units are defined exactly, so the factor is exact. Per Degree Celsius definition: per degree Celsius; ppm/°F definition: ppm per degree Fahrenheit.
Worked examples
- A reading of 0.000012 °C⁻¹ converts to 6.666666667 ppm/°F.
0.000012 °C⁻¹ × 555555.5556 = 6.666666667 ppm/°F - A value of 0.00005 °C⁻¹ is 27.77777778 ppm/°F.
0.00005 °C⁻¹ × 555555.5556 = 27.77777778 ppm/°F
Per Degree Celsius to ppm/°F conversion table
| Per Degree Celsius (°C⁻¹) | ppm/°F |
|---|---|
| 0.0000005 °C⁻¹ | 0.2777777778 ppm/°F |
| 0.000001 °C⁻¹ | 0.5555555556 ppm/°F |
| 0.000009 °C⁻¹ | 5 ppm/°F |
| 0.000012 °C⁻¹ | 6.666666667 ppm/°F |
| 0.000017 °C⁻¹ | 9.444444444 ppm/°F |
| 0.0000231 °C⁻¹ | 12.83333333 ppm/°F |
| 0.00005 °C⁻¹ | 27.77777778 ppm/°F |
| 0.0001 °C⁻¹ | 55.55555556 ppm/°F |
| 0.00021 °C⁻¹ | 116.6666667 ppm/°F |
| 0.001 °C⁻¹ | 555.5555556 ppm/°F |
Where it's used
Per Degree Celsius are used for engineering handbooks and material tables, while ppm per degree Fahrenheit appear in US material and alloy datasheets. Both measure coefficient of thermal expansion (α, CTE), so the conversion is a fixed factor.
Per Degree Celsius to other thermal expansion coefficient units
| Conversion | 1 °C⁻¹ equals |
|---|---|
| per degree Celsius to ppm per degree Fahrenheit | 555555.5556 ppm/°F |
| per degree Celsius to per kelvin | 1 K⁻¹ |
| per degree Celsius to ppm per kelvin | 1000000 ppm/K |
| per degree Celsius to per degree Fahrenheit | 0.5555555556 °F⁻¹ |
Frequently asked questions
How many ppm per degree Fahrenheit are in 1 per degree Celsius?
1 °C⁻¹ = 555555.5556 ppm/°F.
How do I convert per degree Celsius to ppm per degree Fahrenheit?
Multiply the value in °C⁻¹ by 555555.5556. For example, 15 °C⁻¹ × 555555.5556 = 8333333.333 ppm/°F.
Is the °C⁻¹ to ppm/°F conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, degree Celsius.
- 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). Convert Per Degree Celsius to ppm/°F (°C⁻¹ to ppm/°F). Retrieved October 25, 2026, from https://scientificconverters.com/thermal-expansion/per-degree-celsius-to-ppm-per-degree-fahrenheit/
IEEE
Scientific Converters, "Convert Per Degree Celsius to ppm/°F (°C⁻¹ to ppm/°F)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/thermal-expansion/per-degree-celsius-to-ppm-per-degree-fahrenheit/