Convert ppm per degree Fahrenheit to Percent per degree Fahrenheit
Convert ppm per degree Fahrenheit (ppm/°F) to Percent per degree Fahrenheit (%/°F) instantly and accurately.
Conversion Formula
%/°F = ppm/°F × 1.000000000e-4
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.
About Percent per degree Fahrenheit
The %/°F equals 9/5 × 10⁻² /K ≈ 0.018 /K, the Fahrenheit percent-expansion unit used in US polymer and rubber industry specifications. PTFE: ≈0.0075 %/°F; HDPE: ≈0.0083 %/°F; silicone rubber: ≈0.056 %/°F. 1 %/°F = 9/5 × 10⁻² /K ≈1.8 %/K.
Quick Reference Table
| ppm per degree Fahrenheit (ppm/°F) | Percent per degree Fahrenheit (%/°F) |
|---|---|
| 1 ppm/°F | 1 × 10-4 %/°F |
| 2 ppm/°F | 0.0002 %/°F |
| 5 ppm/°F | 0.0005 %/°F |
| 10 ppm/°F | 0.001 %/°F |
| 25 ppm/°F | 0.0025 %/°F |
| 50 ppm/°F | 0.005 %/°F |
| 100 ppm/°F | 0.01 %/°F |