Convert ppb per kelvin to Per degree Fahrenheit
Convert ppb per kelvin (ppb/K) to Per degree Fahrenheit (1/°F) instantly and accurately.
Conversion Formula
1/°F = ppb/K × 5.555555556e-10
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 Per degree Fahrenheit
The per degree Fahrenheit (1/°F = °F⁻¹) equals exactly 9/5 /K = 1.8 /K and is the imperial counterpart of the SI unit. Found in ASME boiler and pressure vessel codes, ASHRAE engineering tables, and UL material data sheets. Iron: ≈6.7 × 10⁻⁶ /°F; ordinary glass: ≈4.9 × 10⁻⁶ /°F. 1 /°F = 9/5 /K (= 1/°R).
Quick Reference Table
| ppb per kelvin (ppb/K) | Per degree Fahrenheit (1/°F) |
|---|---|
| 1 ppb/K | 5.556 × 10-10 1/°F |
| 2 ppb/K | 1.111 × 10-9 1/°F |
| 5 ppb/K | 2.778 × 10-9 1/°F |
| 10 ppb/K | 5.556 × 10-9 1/°F |
| 25 ppb/K | 1.389 × 10-8 1/°F |
| 50 ppb/K | 2.778 × 10-8 1/°F |
| 100 ppb/K | 5.556 × 10-8 1/°F |