Convert ppb per degree Fahrenheit to Per kelvin
Convert ppb per degree Fahrenheit (ppb/°F) to Per kelvin (1/K) instantly and accurately.
Conversion Formula
1/K = 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 kelvin
The per kelvin (1/K = K⁻¹) is the SI unit for linear thermal expansion coefficient (α = (1/L) dL/dT). Used in NIST databases, FEA material cards, and thermodynamics textbooks. Liquid mercury: ≈6.1 × 10⁻⁵ /K; aluminium: ≈2.3 × 10⁻⁵ /K; fused silica: ≈5.5 × 10⁻⁷ /K. 1 /K = 10⁶ ppm/K = 1/°C.
Quick Reference Table
| ppb per degree Fahrenheit (ppb/°F) | Per kelvin (1/K) |
|---|---|
| 1 ppb/°F | 1.8 × 10-9 1/K |
| 2 ppb/°F | 3.6 × 10-9 1/K |
| 5 ppb/°F | 9 × 10-9 1/K |
| 10 ppb/°F | 1.8 × 10-8 1/K |
| 25 ppb/°F | 4.5 × 10-8 1/K |
| 50 ppb/°F | 9 × 10-8 1/K |
| 100 ppb/°F | 1.8 × 10-7 1/K |