Pipe Schedule Converter
Look up pipe schedule numbers and their wall thickness for standard pipe sizes.
Select nominal pipe size and schedule for dimensions.
Select pipe size and schedule — see wall thickness and inner diameter.
Pipe Dimensions by Schedule
Pipe schedule numbers indicate wall thickness for a given nominal pipe size.
Higher schedule = thicker wall = higher pressure rating.
Common schedules:
- Schedule 5: thin wall (low pressure)
- Schedule 10: light wall
- Schedule 40: standard (most common for plumbing)
- Schedule 80: extra heavy (high pressure, industrial)
- Schedule 160: very heavy (extreme pressure)
Example: 1-inch nominal pipe:
| Schedule | Wall (in) | Wall (mm) | ID (in) |
|---|---|---|---|
| Sch 5 | 0.065 | 1.651 | 1.185 |
| Sch 10 | 0.109 | 2.769 | 1.097 |
| Sch 40 | 0.133 | 3.378 | 1.049 |
| Sch 80 | 0.179 | 4.547 | 0.957 |
| Sch 160 | 0.250 | 6.350 | 0.815 |
Note: “Nominal” pipe size is NOT the actual diameter. The outer diameter (OD) stays the same for all schedules. The inner diameter (ID) decreases as wall thickness increases.