Convert ppm per kelvin to Per kelvin
Convert ppm per kelvin (ppm/K) to Per kelvin (1/K) instantly and accurately.
Conversion Formula
1/K = ppm/K × 1.000000000e-6
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 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.
Quick Reference Table
| ppm per kelvin (ppm/K) | Per kelvin (1/K) |
|---|---|
| 1 ppm/K | 1 × 10-6 1/K |
| 2 ppm/K | 2 × 10-6 1/K |
| 5 ppm/K | 5 × 10-6 1/K |
| 10 ppm/K | 1 × 10-5 1/K |
| 25 ppm/K | 2.5 × 10-5 1/K |
| 50 ppm/K | 5 × 10-5 1/K |
| 100 ppm/K | 1 × 10-4 1/K |