Convert ppm per degree Fahrenheit to Millimetres per metre per degree Fahrenheit
Convert ppm per degree Fahrenheit (ppm/°F) to Millimetres per metre per degree Fahrenheit (mm/(m·°F)) instantly and accurately.
Conversion Formula
mm/(m·°F) = ppm/°F × 0.001
About ppm per degree Fahrenheit
The ppm/°F (= μin/(in·°F) exactly) equals 9/5 × 10⁻⁶ /K ≈1.8 × 10⁻⁶ /K and is the dominant CTE unit in US ASTM standards, ASME piping codes, and mechanical engineering handbooks. Steel ≈6.7 ppm/°F; aluminium ≈12.8 ppm/°F; copper ≈9.4 ppm/°F. 1 ppm/°F = 9/5 × 10⁻⁶ /K.
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.
Quick Reference Table
| ppm per degree Fahrenheit (ppm/°F) | Millimetres per metre per degree Fahrenheit (mm/(m·°F)) |
|---|---|
| 1 ppm/°F | 0.001 mm/(m·°F) |
| 2 ppm/°F | 0.002 mm/(m·°F) |
| 5 ppm/°F | 0.005 mm/(m·°F) |
| 10 ppm/°F | 0.01 mm/(m·°F) |
| 25 ppm/°F | 0.025 mm/(m·°F) |
| 50 ppm/°F | 0.05 mm/(m·°F) |
| 100 ppm/°F | 0.1 mm/(m·°F) |