Convert Millimetres per metre per kelvin to ppb per kelvin

Convert Millimetres per metre per kelvin (mm/(m·K)) to ppb per kelvin (ppb/K) instantly and accurately.

Millimetres per metre per kelvin (mm/(m·K))
ppb per kelvin (ppb/K)

Conversion Formula

ppb/K = mm/(m·K) × 1000000

About Millimetres per metre per kelvin

The mm/(m·K) equals exactly 10⁻³ /K = 1000 ppm/K and is used in structural and civil engineering for bridge girder and pipeline thermal-expansion calculations. Steel at 0.012 mm/(m·K) expands 12 mm per 100 m track per 10 K rise. Polymers: 0.07-0.20 mm/(m·K). 1 mm/(m·K) = 10⁻³ /K = 1000 ppm/K.

About ppb per kelvin

The ppb/K (parts per billion per kelvin) equals 10⁻⁹ /K and is the resolution unit for ultra-low-CTE materials. Zerodur Class 0 (±0.02 ppb/K) and ULE titanium-silicate glass (±0.03 ppb/K) at 20 °C are characterised in ppb/K for gravitational-wave interferometers and space telescope optical benches. 1 ppb/K = 10⁻⁹ /K = 10⁻³ ppm/K.

Quick Reference Table

Millimetres per metre per kelvin (mm/(m·K))ppb per kelvin (ppb/K)
1 mm/(m·K)1000000 ppb/K
2 mm/(m·K)2000000 ppb/K
5 mm/(m·K)5000000 ppb/K
10 mm/(m·K)10000000 ppb/K
25 mm/(m·K)25000000 ppb/K
50 mm/(m·K)50000000 ppb/K
100 mm/(m·K)100000000 ppb/K

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