Convert Percent per kelvin to ppb per degree Fahrenheit
Convert Percent per kelvin (%/K) to ppb per degree Fahrenheit (ppb/°F) instantly and accurately.
Conversion Formula
ppb/°F = %/K × 5555555.556
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.
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
| Percent per kelvin (%/K) | ppb per degree Fahrenheit (ppb/°F) |
|---|---|
| 1 %/K | 5555560 ppb/°F |
| 2 %/K | 11111100 ppb/°F |
| 5 %/K | 27777800 ppb/°F |
| 10 %/K | 55555600 ppb/°F |
| 25 %/K | 138889000 ppb/°F |
| 50 %/K | 277778000 ppb/°F |
| 100 %/K | 555556000 ppb/°F |