TOOLS
Tubing unit converter: pressure, size and temperature
Convert pressure, tubing size and temperature, and work out wall thickness from OD and ID. The results are plain arithmetic. When you quote a rated pressure, use the value and unit exactly as printed on the data sheet.
Common conversions
| bar | psi | MPa | kgf/cm² |
|---|---|---|---|
| 1 | 14.50 | 0.1 | 1.020 |
| 6 | 87.02 | 0.6 | 6.118 |
| 10 | 145.04 | 1 | 10.197 |
| 16 | 232.06 | 1.6 | 16.315 |
| 20 | 290.08 | 2 | 20.394 |
| 41 | 594.65 | 4.1 | 41.808 |
| Inch size | mm |
|---|---|
| 1/8 in | 3.175 |
| 1/4 in | 6.35 |
| 3/8 in | 9.525 |
| 1/2 in | 12.7 |
| 3/4 in | 19.05 |
Metric and inch tubing sizes are not interchangeable
A metric OD and the nearest inch OD differ by a few tenths of a millimeter, more than the ±0.10 mm tolerance on our nylon tubing. A tube and fitting must come from the same size system.
| Metric OD | Nearest inch OD | Difference |
|---|---|---|
| 6 mm | 1/4 in (6.35 mm) | 0.35 mm |
| 10 mm | 3/8 in (9.525 mm) | 0.475 mm |
| 12 mm | 1/2 in (12.7 mm) | 0.70 mm |
Related pages
- Tubing size chart: every OD, ID and wall we list, with working pressure.
- Compressed air flow calculator: air velocity and pressure drop for a given tube size, length and flow.
- Pressure and temperature guide: derating by temperature.
- Tubing glossary: what OD, ID, working pressure and burst pressure mean.
- Data sheets: rated values as printed.
Need a size or pressure confirmed for your line? Send your requirements.