Length
Convert inch (in) to micrometre (µm). Length units span pipe diameters (mm, inch), plant dimensions (m, ft), and roughness (µm) — mixing metric and imperial is routine.
1 in = 25400 µm
To convert inch to micrometre, multiply the in value by 25400. To go the other way, divide by 25400 (or multiply by 3.937e-5).
| in | µm |
|---|---|
| 1 | 25400 |
| 2 | 50800 |
| 5 | 127000 |
| 10 | 254000 |
| 25 | 635000 |
| 50 | 1270000 |
| 100 | 2540000 |
| 250 | 6350000 |
| 500 | 1.27e+7 |
| 1000 | 2.54e+7 |
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 3.937008 in is 100000 µm.
Multiply the value in in by 25400 to get µm. For example, 10 in = 254000 µm.
1 in equals 25400 µm.
Pipe sizes are labelled in inches (NPS) but calculated in mm; equipment layouts mix metres and feet.