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Engineering calculators and conversion utilities for field work.
Pipe ID & Wall Thickness
Reference data for Nominal Pipe Size (NPS) and Schedule.
Schedule 40 (Standard)
Schedule 80 (Extra Strong)
$$ID = OD - (2 \times t_{wall})$$
Where $ID$ is determined by the Schedule (Sch) thickness.
Show Pipe Geometry Definitions
| Symbol | Definition | Standard Unit |
|---|---|---|
| $NPS$ | Nominal Pipe Size | Inches |
| $OD$ | Outside Diameter | Inches |
| $ID$ | Inside Diameter | Inches |
| $t_{wall}$ | Wall Thickness | Inches |
| $Sch$ | Schedule | Standard Number |