Convert Per degree Fahrenheit to Per degree Celsius
Convert Per degree Fahrenheit (1/°F) to Per degree Celsius (1/°C) instantly and accurately.
Conversion Formula
1/°C = 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 degree Celsius
The per degree Celsius (1/°C = °C⁻¹) equals exactly 1/K since temperature intervals 1 °C = 1 K (exact). Common in European and ISO standards, chemistry textbooks, and physics literature as an alternative notation for the SI unit 1/K. A material with α = 12 × 10⁻⁶ /K is identically expressed as 12 × 10⁻⁶ /°C. 1 /°C = 1 /K = 10⁶ ppm/K.
Quick Reference Table
| Per degree Fahrenheit (1/°F) | Per degree Celsius (1/°C) |
|---|---|
| 1 1/°F | 1.8 1/°C |
| 2 1/°F | 3.6 1/°C |
| 5 1/°F | 9 1/°C |
| 10 1/°F | 18 1/°C |
| 25 1/°F | 45 1/°C |
| 50 1/°F | 90 1/°C |
| 100 1/°F | 180 1/°C |