Convert Per degree Fahrenheit to Per kelvin
Convert Per degree Fahrenheit (1/°F) to Per kelvin (1/K) instantly and accurately.
Conversion Formula
1/K = 1/°F × 1.8
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 Per kelvin
The per kelvin (1/K = K⁻¹) is the SI unit for linear thermal expansion coefficient (α = (1/L) dL/dT). Used in NIST databases, FEA material cards, and thermodynamics textbooks. Liquid mercury: ≈6.1 × 10⁻⁵ /K; aluminium: ≈2.3 × 10⁻⁵ /K; fused silica: ≈5.5 × 10⁻⁷ /K. 1 /K = 10⁶ ppm/K = 1/°C.
Quick Reference Table
| Per degree Fahrenheit (1/°F) | Per kelvin (1/K) |
|---|---|
| 1 1/°F | 1.8 1/K |
| 2 1/°F | 3.6 1/K |
| 5 1/°F | 9 1/K |
| 10 1/°F | 18 1/K |
| 25 1/°F | 45 1/K |
| 50 1/°F | 90 1/K |
| 100 1/°F | 180 1/K |