Convert ppb per kelvin to Percent per degree Fahrenheit
Convert ppb per kelvin (ppb/K) to Percent per degree Fahrenheit (%/°F) instantly and accurately.
Conversion Formula
%/°F = ppb/K × 5.555555556e-8
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 Percent per degree Fahrenheit
The %/°F equals 9/5 × 10⁻² /K ≈ 0.018 /K, the Fahrenheit percent-expansion unit used in US polymer and rubber industry specifications. PTFE: ≈0.0075 %/°F; HDPE: ≈0.0083 %/°F; silicone rubber: ≈0.056 %/°F. 1 %/°F = 9/5 × 10⁻² /K ≈1.8 %/K.
Quick Reference Table
| ppb per kelvin (ppb/K) | Percent per degree Fahrenheit (%/°F) |
|---|---|
| 1 ppb/K | 5.556 × 10-8 %/°F |
| 2 ppb/K | 1.111 × 10-7 %/°F |
| 5 ppb/K | 2.778 × 10-7 %/°F |
| 10 ppb/K | 5.556 × 10-7 %/°F |
| 25 ppb/K | 1.389 × 10-6 %/°F |
| 50 ppb/K | 2.778 × 10-6 %/°F |
| 100 ppb/K | 5.556 × 10-6 %/°F |