Convert ppb per kelvin to Millimetres per metre per degree Fahrenheit
Convert ppb per kelvin (ppb/K) to Millimetres per metre per degree Fahrenheit (mm/(m·°F)) instantly and accurately.
Conversion Formula
mm/(m·°F) = ppb/K × 5.555555556e-7
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 Millimetres per metre per degree Fahrenheit
The mm/(m·°F) equals 9/5 × 10⁻³ /K ≈1.8 × 10⁻³ /K, combining metric displacement with Fahrenheit temperature. It appears in US-origin pipeline and structural reports where dimensions are given in metres but temperatures in °F. Steel: ≈0.00667 mm/(m·°F); aluminium: ≈0.01283 mm/(m·°F). 1 mm/(m·°F) = 9/5 × 10⁻³ /K.
Quick Reference Table
| ppb per kelvin (ppb/K) | Millimetres per metre per degree Fahrenheit (mm/(m·°F)) |
|---|---|
| 1 ppb/K | 5.556 × 10-7 mm/(m·°F) |
| 2 ppb/K | 1.111 × 10-6 mm/(m·°F) |
| 5 ppb/K | 2.778 × 10-6 mm/(m·°F) |
| 10 ppb/K | 5.556 × 10-6 mm/(m·°F) |
| 25 ppb/K | 1.389 × 10-5 mm/(m·°F) |
| 50 ppb/K | 2.778 × 10-5 mm/(m·°F) |
| 100 ppb/K | 5.556 × 10-5 mm/(m·°F) |