Convert ppm per kelvin to Microns per metre per degree Celsius
Convert ppm per kelvin (ppm/K) to Microns per metre per degree Celsius (μm/(m·°C)) instantly and accurately.
Conversion Formula
μm/(m·°C) = ppm/K × 1
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 Microns per metre per degree Celsius
The micrometre per metre per degree Celsius (μm/(m·°C)) equals exactly 10⁻⁶ /K, since temperature intervals 1 °C = 1 K (exact). It is the standard CTE notation in European engineering datasheets, ISO material standards, and many textbooks. Numerically identical to ppm/K. Aluminium: 23.1 μm/(m·°C); steel: ≈12 μm/(m·°C). 1 μm/(m·°C) = 1 ppm/K = 10⁻⁶ /K.
Quick Reference Table
| ppm per kelvin (ppm/K) | Microns per metre per degree Celsius (μm/(m·°C)) |
|---|---|
| 1 ppm/K | 1 μm/(m·°C) |
| 2 ppm/K | 2 μm/(m·°C) |
| 5 ppm/K | 5 μm/(m·°C) |
| 10 ppm/K | 10 μm/(m·°C) |
| 25 ppm/K | 25 μm/(m·°C) |
| 50 ppm/K | 50 μm/(m·°C) |
| 100 ppm/K | 100 μm/(m·°C) |