Common Pipe Dimensions Calculator
Imperial Pipe Dimensions
| Nominal Size | Inner Diameter | Outer Diameter |
|---|---|---|
| 1/8″ | 0.405″ | 0.405″ |
| 1/4″ | 0.540″ | 0.540″ |
| 3/8″ | 0.675″ | 0.675″ |
| 1/2″ | 0.840″ | 0.840″ |
| 3/4″ | 1.050″ | 1.050″ |
| 1″ | 1.315″ | 1.315″ |
| 1 1/4″ | 1.660″ | 1.660″ |
| 1 1/2″ | 1.900″ | 1.900″ |
| 2″ | 2.375″ | 2.375″ |
| 2 1/2″ | 2.875″ | 2.875″ |
| 3″ | 3.500″ | 3.500″ |
| 4″ | 4.500″ | 4.500″ |
| 5″ | 5.563″ | 5.563″ |
| 6″ | 6.625″ | 6.625″ |
Metric Pipe Dimensions
| Nominal Size | Inner Diameter | Outer Diameter |
|---|---|---|
| 6 mm | 6 mm | 10.2 mm |
| 8 mm | 8 mm | 13.5 mm |
| 10 mm | 10 mm | 17.2 mm |
| 15 mm | 15 mm | 21.3 mm |
| 20 mm | 20 mm | 26.9 mm |
| 25 mm | 25 mm | 33.7 mm |
| 32 mm | 32 mm | 42.4 mm |
| 40 mm | 40 mm | 48.3 mm |
| 50 mm | 50 mm | 60.3 mm |
| 65 mm | 65 mm | 76.1 mm |
| 80 mm | 80 mm | 88.9 mm |
| 100 mm | 100 mm | 114.3 mm |
| 125 mm | 125 mm | 139.7 mm |
| 150 mm | 150 mm | 165.1 mm |
Understanding Pipe Dimensions
Pipe dimensions are crucial for plumbing and construction projects. Here are key points to remember:
Nominal Size vs. Actual Size
The nominal size of a pipe is its commercial designation, which may differ from its actual measurements. Always refer to actual inner and outer diameters for precise specifications.
Common Applications
- Residential plumbing typically uses 1/2" to 1" pipes
- Commercial applications often require 2" to 6" pipes
- Industrial settings may use larger dimensions
Material Considerations
Different pipe materials (PVC, copper, steel) may have slightly different dimensions even for the same nominal size. Always verify compatibility with your specific application.