Convert Millimetres per metre per degree Celsius to ppb per degree Fahrenheit
Convert Millimetres per metre per degree Celsius (mm/(m·°C)) to ppb per degree Fahrenheit (ppb/°F) instantly and accurately.
Conversion Formula
ppb/°F = mm/(m·°C) × 555555.5556
About Millimetres per metre per degree Celsius
The millimetre per metre per degree Celsius (mm/(m·°C)) equals exactly 10⁻³ /K = 1 mm/(m·K), since temperature intervals 1 °C = 1 K (exact). Used in European structural engineering, EN standards, and civil/mechanical design codes for expansion joint sizing. Steel rail: 0.012 mm/(m·°C); aluminium curtain wall: 0.023 mm/(m·°C). 1 mm/(m·°C) = 10⁻³ /K = 1 mm/(m·K).
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.
Quick Reference Table
| Millimetres per metre per degree Celsius (mm/(m·°C)) | ppb per degree Fahrenheit (ppb/°F) |
|---|---|
| 1 mm/(m·°C) | 555556 ppb/°F |
| 2 mm/(m·°C) | 1111110 ppb/°F |
| 5 mm/(m·°C) | 2777780 ppb/°F |
| 10 mm/(m·°C) | 5555560 ppb/°F |
| 25 mm/(m·°C) | 13888900 ppb/°F |
| 50 mm/(m·°C) | 27777800 ppb/°F |
| 100 mm/(m·°C) | 55555600 ppb/°F |