Length
Convert foot (ft) to inch (in). Length units span pipe diameters (mm, inch), plant dimensions (m, ft), and roughness (µm) — mixing metric and imperial is routine.
1 ft = 12 in
To convert foot to inch, multiply the ft value by 12. To go the other way, divide by 12 (or multiply by 0.08333333).
| ft | in |
|---|---|
| 1 | 12 |
| 2 | 24 |
| 5 | 60 |
| 10 | 120 |
| 25 | 300 |
| 50 | 600 |
| 100 | 1200 |
| 250 | 3000 |
| 500 | 6000 |
| 1000 | 12000 |
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 0.328084 ft is 3.937008 in.
Multiply the value in ft by 12 to get in. For example, 10 ft = 120 in.
1 ft equals 12 in.
Pipe sizes are labelled in inches (NPS) but calculated in mm; equipment layouts mix metres and feet.