Convert Per degree Fahrenheit to Millimetres per metre per kelvin
Convert Per degree Fahrenheit (1/°F) to Millimetres per metre per kelvin (mm/(m·K)) instantly and accurately.
Conversion Formula
mm/(m·K) = 1/°F × 1800
About Per degree Fahrenheit
The per degree Fahrenheit (1/°F = °F⁻¹) equals exactly 9/5 /K = 1.8 /K and is the imperial counterpart of the SI unit. Found in ASME boiler and pressure vessel codes, ASHRAE engineering tables, and UL material data sheets. Iron: ≈6.7 × 10⁻⁶ /°F; ordinary glass: ≈4.9 × 10⁻⁶ /°F. 1 /°F = 9/5 /K (= 1/°R).
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.
Quick Reference Table
| Per degree Fahrenheit (1/°F) | Millimetres per metre per kelvin (mm/(m·K)) |
|---|---|
| 1 1/°F | 1800 mm/(m·K) |
| 2 1/°F | 3600 mm/(m·K) |
| 5 1/°F | 9000 mm/(m·K) |
| 10 1/°F | 18000 mm/(m·K) |
| 25 1/°F | 45000 mm/(m·K) |
| 50 1/°F | 90000 mm/(m·K) |
| 100 1/°F | 180000 mm/(m·K) |