Convert ppb per degree Fahrenheit to Per degree Fahrenheit
Convert ppb per degree Fahrenheit (ppb/°F) to Per degree Fahrenheit (1/°F) instantly and accurately.
Conversion Formula
1/°F = ppb/°F × 1.000000000e-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 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 degree Fahrenheit (ppb/°F) | Per degree Fahrenheit (1/°F) |
|---|---|
| 1 ppb/°F | 1 × 10-9 1/°F |
| 2 ppb/°F | 2 × 10-9 1/°F |
| 5 ppb/°F | 5 × 10-9 1/°F |
| 10 ppb/°F | 1 × 10-8 1/°F |
| 25 ppb/°F | 2.5 × 10-8 1/°F |
| 50 ppb/°F | 5 × 10-8 1/°F |
| 100 ppb/°F | 1 × 10-7 1/°F |