Convert Millimetres per metre per degree Fahrenheit to Percent per kelvin
Convert Millimetres per metre per degree Fahrenheit (mm/(m·°F)) to Percent per kelvin (%/K) instantly and accurately.
Conversion Formula
%/K = mm/(m·°F) × 0.18
About Millimetres per metre per degree Fahrenheit
The mm/(m·°F) equals 9/5 × 10⁻³ /K ≈1.8 × 10⁻³ /K, combining metric displacement with Fahrenheit temperature. It appears in US-origin pipeline and structural reports where dimensions are given in metres but temperatures in °F. Steel: ≈0.00667 mm/(m·°F); aluminium: ≈0.01283 mm/(m·°F). 1 mm/(m·°F) = 9/5 × 10⁻³ /K.
About Percent per kelvin
The %/K equals exactly 10⁻² /K = 10 000 ppm/K and is used for high-CTE materials such as polymers, foams, and rubber. PTFE: ≈0.0135 %/K; HDPE: ≈0.015 %/K; natural rubber: ≈0.06 %/K; silicone rubber: ≈0.10 %/K. 1 %/K = 10⁻² /K = 10 mm/(m·K) = 10 000 ppm/K.
Quick Reference Table
| Millimetres per metre per degree Fahrenheit (mm/(m·°F)) | Percent per kelvin (%/K) |
|---|---|
| 1 mm/(m·°F) | 0.18 %/K |
| 2 mm/(m·°F) | 0.36 %/K |
| 5 mm/(m·°F) | 0.9 %/K |
| 10 mm/(m·°F) | 1.8 %/K |
| 25 mm/(m·°F) | 4.5 %/K |
| 50 mm/(m·°F) | 9 %/K |
| 100 mm/(m·°F) | 18 %/K |