Thermal Expansion Converter

Convert between all linear thermal expansion coefficient units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: per kelvin (1/K)

Conversion Formula

About Thermal Expansion Units

Common Thermal Expansion Conversions

• 1 ppm/K = 10^-6 /K = 1 µm/(m·K); 1 ppm/°F = 9/5 × 10^-6 /K ≈ 1.8 ppm/K (= 1 µin/(in·°F))
• 1 ppm/°F ≈ 1.8 ppm/K; 1 ppm/K ≈ 0.5556 ppm/°F
• 1 mm/(m·K) = 10^-3 /K = 1000 ppm/K; 1 mm/(m·°F) = 9/5 × 10^-3 /K ≈ 1.8 mm/(m·K)
• 1 /K = 10⁶ ppm/K = 1/°C; 1 /°F = 9/5 /K = 1.8 /K (= 1/°R)
• 1 /mK = 1000 /K = 10⁹ ppm/K; 1 /µK = 10⁶ /K = 10¹² ppm/K
• Aluminium: 23.1 ppm/K ≈ 12.8 ppm/°F ≈ 0.0231 mm/(m·K)
• Steel (carbon): ≈ 12 ppm/K ≈ 6.7 ppm/°F ≈ 0.012 mm/(m·K)
• Copper: ≈ 17 ppm/K ≈ 9.4 ppm/°F; Invar (Fe-36Ni): ≈ 1.2 ppm/K ≈ 0.67 ppm/°F
• Fused silica: ≈ 0.55 ppm/K; Zerodur Class 0: ≈ ±0.02 ppb/K ≈ ±0.011 ppb/°F
• PTFE: ≈ 135 ppm/K ≈ 0.0135 %/K; Natural rubber: ≈ 600 ppm/K ≈ 0.060 %/K

Direct Converters