Convert Per kelvin to ppb per kelvin
Convert Per kelvin (1/K) to ppb per kelvin (ppb/K) instantly and accurately.
Conversion Formula
ppb/K = 1/K × 1000000000
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.
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.
Quick Reference Table
| Per kelvin (1/K) | ppb per kelvin (ppb/K) |
|---|---|
| 1 1/K | 1000000000 ppb/K |
| 2 1/K | 2 × 109 ppb/K |
| 5 1/K | 5 × 109 ppb/K |
| 10 1/K | 1 × 1010 ppb/K |
| 25 1/K | 2.5 × 1010 ppb/K |
| 50 1/K | 5 × 1010 ppb/K |
| 100 1/K | 1 × 1011 ppb/K |