Convert ppm per kelvin to Percent per degree Fahrenheit
Convert ppm per kelvin (ppm/K) to Percent per degree Fahrenheit (%/°F) instantly and accurately.
Conversion Formula
%/°F = ppm/K × 5.555555556e-5
About ppm per kelvin
The ppm/K (= μm/(m·K) exactly) equals 10⁻⁶ /K and is the universal CTE unit in international materials standards (ISO, EN, DIN). Aluminium: 23.1 ppm/K; steel: ≈12 ppm/K; ordinary glass: ≈9 ppm/K; fused silica: 0.55 ppm/K; Invar: ≈1.2 ppm/K. 1 ppm/K = 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 kelvin (ppm/K) | Percent per degree Fahrenheit (%/°F) |
|---|---|
| 1 ppm/K | 5.556 × 10-5 %/°F |
| 2 ppm/K | 0.000111111 %/°F |
| 5 ppm/K | 0.000277778 %/°F |
| 10 ppm/K | 0.000555556 %/°F |
| 25 ppm/K | 0.00138889 %/°F |
| 50 ppm/K | 0.00277778 %/°F |
| 100 ppm/K | 0.00555556 %/°F |