1/8 inch (DN 6) pipe dimensions & weight
1/8 inch (DN 6) steel pipe has an outside diameter of 10.3 mm (0.406 in) in every schedule. Below: wall thickness, inside diameter, weight per metre and water capacity for each ASME B36.10M / B36.19M schedule.
| Schedule | Wall (mm) | Wall (in) | ID (mm) | CS kg/m | CS lb/ft | SS 304 kg/m | Water L/m |
|---|---|---|---|---|---|---|---|
| Sch 10S | 1.24 | 0.049 | 7.82 | 0.28 | 0.19 | 0.28 | 0.05 |
| STD | 1.73 | 0.068 | 6.84 | 0.37 | 0.25 | 0.37 | 0.04 |
| Sch 40 | 1.73 | 0.068 | 6.84 | 0.37 | 0.25 | 0.37 | 0.04 |
| XS | 2.41 | 0.095 | 5.48 | 0.47 | 0.32 | 0.47 | 0.02 |
| Sch 80 | 2.41 | 0.095 | 5.48 | 0.47 | 0.32 | 0.47 | 0.02 |
CS = carbon steel (7.85 g/cm³). SS 304 at 7.93 g/cm³; for 316 multiply CS weight by 1.017. Water capacity = internal volume per metre.
Frequently asked questions
What is the OD of 1/8 inch pipe?
1/8 inch (DN 6) pipe has an outside diameter of 10.3 mm (0.406 in), regardless of schedule.
What is the wall thickness of 1/8 inch Schedule 40 pipe?
1.73 mm (0.068 in), giving an inside diameter of 6.84 mm.
How much does 1/8 inch Schedule 40 pipe weigh?
About 0.37 kg/m (0.25 lb/ft) in carbon steel, or 2.2 kg for a 6 m length.
What is the wall thickness of 1/8 inch Schedule 80 pipe?
2.41 mm, with an inside diameter of 5.48 mm and weight of 0.47 kg/m.
Last updated 2026-11-02