Convert ppb per degree Fahrenheit to Per millikelvin
Convert ppb per degree Fahrenheit (ppb/°F) to Per millikelvin (1/mK) instantly and accurately.
Conversion Formula
1/mK = ppb/°F × 1.800000000e-12
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.
About Per millikelvin
The per millikelvin (1/mK) equals exactly 10³ /K and is encountered in cryogenic physics where working temperatures lie in the millikelvin range. Near quantum phase transitions and magnetic ordering temperatures, anomalous CTE values can reach orders far above room-temperature CTE. 1 /mK = 10³ /K = 10⁹ ppm/K.
Quick Reference Table
| ppb per degree Fahrenheit (ppb/°F) | Per millikelvin (1/mK) |
|---|---|
| 1 ppb/°F | 1.8 × 10-12 1/mK |
| 2 ppb/°F | 3.6 × 10-12 1/mK |
| 5 ppb/°F | 9 × 10-12 1/mK |
| 10 ppb/°F | 1.8 × 10-11 1/mK |
| 25 ppb/°F | 4.5 × 10-11 1/mK |
| 50 ppb/°F | 9 × 10-11 1/mK |
| 100 ppb/°F | 1.8 × 10-10 1/mK |