Convert ppb per degree Fahrenheit to Per degree Celsius
Convert ppb per degree Fahrenheit (ppb/°F) to Per degree Celsius (1/°C) instantly and accurately.
Conversion Formula
1/°C = ppb/°F × 1.800000000e-9
About ppb per degree Fahrenheit
The ppb/°F equals 9/5 × 10⁻⁹ /K ≈1.8 × 10⁻⁹ /K, the Fahrenheit counterpart of ppb/K. Used when ultra-low-expansion glass ceramics are characterised in US laboratories using Fahrenheit protocols. Zerodur at ±0.02 ppb/K ≈ ±0.011 ppb/°F. 1 ppb/°F = 9/5 × 10⁻⁹ /K ≈1.8 ppb/K.
About Per degree Celsius
The per degree Celsius (1/°C = °C⁻¹) equals exactly 1/K since temperature intervals 1 °C = 1 K (exact). Common in European and ISO standards, chemistry textbooks, and physics literature as an alternative notation for the SI unit 1/K. A material with α = 12 × 10⁻⁶ /K is identically expressed as 12 × 10⁻⁶ /°C. 1 /°C = 1 /K = 10⁶ ppm/K.
Quick Reference Table
| ppb per degree Fahrenheit (ppb/°F) | Per degree Celsius (1/°C) |
|---|---|
| 1 ppb/°F | 1.8 × 10-9 1/°C |
| 2 ppb/°F | 3.6 × 10-9 1/°C |
| 5 ppb/°F | 9 × 10-9 1/°C |
| 10 ppb/°F | 1.8 × 10-8 1/°C |
| 25 ppb/°F | 4.5 × 10-8 1/°C |
| 50 ppb/°F | 9 × 10-8 1/°C |
| 100 ppb/°F | 1.8 × 10-7 1/°C |