Convert Per degree Fahrenheit to ppm per degree Fahrenheit
Convert Per degree Fahrenheit (1/°F) to ppm per degree Fahrenheit (ppm/°F) instantly and accurately.
Conversion Formula
ppm/°F = 1/°F × 1000000
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 ppm per degree Fahrenheit
The ppm/°F (= μin/(in·°F) exactly) equals 9/5 × 10⁻⁶ /K ≈1.8 × 10⁻⁶ /K and is the dominant CTE unit in US ASTM standards, ASME piping codes, and mechanical engineering handbooks. Steel ≈6.7 ppm/°F; aluminium ≈12.8 ppm/°F; copper ≈9.4 ppm/°F. 1 ppm/°F = 9/5 × 10⁻⁶ /K.
Quick Reference Table
| Per degree Fahrenheit (1/°F) | ppm per degree Fahrenheit (ppm/°F) |
|---|---|
| 1 1/°F | 1000000 ppm/°F |
| 2 1/°F | 2000000 ppm/°F |
| 5 1/°F | 5000000 ppm/°F |
| 10 1/°F | 10000000 ppm/°F |
| 25 1/°F | 25000000 ppm/°F |
| 50 1/°F | 50000000 ppm/°F |
| 100 1/°F | 100000000 ppm/°F |