Convert ppb per degree Fahrenheit to Percent per kelvin
Convert ppb per degree Fahrenheit (ppb/°F) to Percent per kelvin (%/K) instantly and accurately.
Conversion Formula
%/K = ppb/°F × 1.800000000e-7
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 Percent per kelvin
The %/K equals exactly 10⁻² /K = 10 000 ppm/K and is used for high-CTE materials such as polymers, foams, and rubber. PTFE: ≈0.0135 %/K; HDPE: ≈0.015 %/K; natural rubber: ≈0.06 %/K; silicone rubber: ≈0.10 %/K. 1 %/K = 10⁻² /K = 10 mm/(m·K) = 10 000 ppm/K.
Quick Reference Table
| ppb per degree Fahrenheit (ppb/°F) | Percent per kelvin (%/K) |
|---|---|
| 1 ppb/°F | 1.8 × 10-7 %/K |
| 2 ppb/°F | 3.6 × 10-7 %/K |
| 5 ppb/°F | 9 × 10-7 %/K |
| 10 ppb/°F | 1.8 × 10-6 %/K |
| 25 ppb/°F | 4.5 × 10-6 %/K |
| 50 ppb/°F | 9 × 10-6 %/K |
| 100 ppb/°F | 1.8 × 10-5 %/K |