Convert ppb per kelvin to ppb per degree Fahrenheit
Convert ppb per kelvin (ppb/K) to ppb per degree Fahrenheit (ppb/°F) instantly and accurately.
Conversion Formula
ppb/°F = ppb/K × 0.5555555556
About ppb per kelvin
The ppb/K (parts per billion per kelvin) equals 10⁻⁹ /K and is the resolution unit for ultra-low-CTE materials. Zerodur Class 0 (±0.02 ppb/K) and ULE titanium-silicate glass (±0.03 ppb/K) at 20 °C are characterised in ppb/K for gravitational-wave interferometers and space telescope optical benches. 1 ppb/K = 10⁻⁹ /K = 10⁻³ ppm/K.
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.
Quick Reference Table
| ppb per kelvin (ppb/K) | ppb per degree Fahrenheit (ppb/°F) |
|---|---|
| 1 ppb/K | 0.555556 ppb/°F |
| 2 ppb/K | 1.11111 ppb/°F |
| 5 ppb/K | 2.77778 ppb/°F |
| 10 ppb/K | 5.55556 ppb/°F |
| 25 ppb/K | 13.8889 ppb/°F |
| 50 ppb/K | 27.7778 ppb/°F |
| 100 ppb/K | 55.5556 ppb/°F |