Convert Millimetres per metre per kelvin to ppb per kelvin
Convert Millimetres per metre per kelvin (mm/(m·K)) to ppb per kelvin (ppb/K) instantly and accurately.
Conversion Formula
ppb/K = mm/(m·K) × 1000000
About Millimetres per metre per kelvin
The mm/(m·K) equals exactly 10⁻³ /K = 1000 ppm/K and is used in structural and civil engineering for bridge girder and pipeline thermal-expansion calculations. Steel at 0.012 mm/(m·K) expands 12 mm per 100 m track per 10 K rise. Polymers: 0.07-0.20 mm/(m·K). 1 mm/(m·K) = 10⁻³ /K = 1000 ppm/K.
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
| Millimetres per metre per kelvin (mm/(m·K)) | ppb per kelvin (ppb/K) |
|---|---|
| 1 mm/(m·K) | 1000000 ppb/K |
| 2 mm/(m·K) | 2000000 ppb/K |
| 5 mm/(m·K) | 5000000 ppb/K |
| 10 mm/(m·K) | 10000000 ppb/K |
| 25 mm/(m·K) | 25000000 ppb/K |
| 50 mm/(m·K) | 50000000 ppb/K |
| 100 mm/(m·K) | 100000000 ppb/K |