Length
Convert kilometre (km) to inch (in). Length units span pipe diameters (mm, inch), plant dimensions (m, ft), and roughness (µm) — mixing metric and imperial is routine.
1 km = 39370.08 in
To convert kilometre to inch, multiply the km value by 39370.08. To go the other way, divide by 39370.08 (or multiply by 2.54e-5).
| km | in |
|---|---|
| 1 | 39370.08 |
| 2 | 78740.16 |
| 5 | 196850.4 |
| 10 | 393700.8 |
| 25 | 984252 |
| 50 | 1968504 |
| 100 | 3937008 |
| 250 | 9842520 |
| 500 | 1.9685e+7 |
| 1000 | 3.937e+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 0.0001 km is 3.937008 in.
Multiply the value in km by 39370.08 to get in. For example, 10 km = 393700.8 in.
1 km equals 39370.08 in.
Pipe sizes are labelled in inches (NPS) but calculated in mm; equipment layouts mix metres and feet.