Length
Convert micrometre (µm) to inch (in). Length units span pipe diameters (mm, inch), plant dimensions (m, ft), and roughness (µm) — mixing metric and imperial is routine.
1 µm = 3.937e-5 in
To convert micrometre to inch, multiply the µm value by 3.937e-5. To go the other way, divide by 3.937e-5 (or multiply by 25400).
| µm | in |
|---|---|
| 1 | 3.937e-5 |
| 2 | 7.874e-5 |
| 5 | 0.0001968504 |
| 10 | 0.0003937008 |
| 25 | 0.000984252 |
| 50 | 0.001968504 |
| 100 | 0.003937008 |
| 250 | 0.00984252 |
| 500 | 0.01968504 |
| 1000 | 0.03937008 |
Pipe sizes are labelled in inches (NPS) but calculated in mm; equipment layouts mix metres and feet.
Velocity scales with the inverse square of diameter, so a small length error compounds quickly in flow calculations.
Worked example. A length of 100000 µm is 3.937008 in.
Multiply the value in µm by 3.937e-5 to get in. For example, 10 µm = 0.0003937008 in.
1 µm equals 3.937e-5 in.
Pipe sizes are labelled in inches (NPS) but calculated in mm; equipment layouts mix metres and feet.