Pipe Size Converter

Convert pipe sizes between NPS (Nominal Pipe Size), DN (Diameter Nominal), and actual outer diameter dimensions. Shows wall thickness and inner diameter for common schedules.

How to Use Pipe Size Converter

Select a pipe size from the dropdown or choose All Sizes for the complete reference table. The tool shows outer diameter in inches and millimeters, plus wall thickness and inner diameter for common schedules.

Step-by-Step Instructions

  1. Select a pipe size (NPS/DN) from the dropdown
  2. Or choose All Sizes for the full reference table
  3. View outer diameter, wall thickness, and inner diameter
  4. Copy the results for your project

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