Convert Per kelvin to ppm per kelvin
Convert Per kelvin (1/K) to ppm per kelvin (ppm/K) instantly and accurately.
Conversion Formula
ppm/K = 1/K × 1000000
About Per kelvin
The per kelvin (1/K = K⁻¹) is the SI unit for linear thermal expansion coefficient (α = (1/L) dL/dT). Used in NIST databases, FEA material cards, and thermodynamics textbooks. Liquid mercury: ≈6.1 × 10⁻⁵ /K; aluminium: ≈2.3 × 10⁻⁵ /K; fused silica: ≈5.5 × 10⁻⁷ /K. 1 /K = 10⁶ ppm/K = 1/°C.
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.
Quick Reference Table
| Per kelvin (1/K) | ppm per kelvin (ppm/K) |
|---|---|
| 1 1/K | 1000000 ppm/K |
| 2 1/K | 2000000 ppm/K |
| 5 1/K | 5000000 ppm/K |
| 10 1/K | 10000000 ppm/K |
| 25 1/K | 25000000 ppm/K |
| 50 1/K | 50000000 ppm/K |
| 100 1/K | 100000000 ppm/K |