Engineering reference materials and measurement instruments

Engineering Conversion Tables

Convert pressure, temperature, torque, length, and force units instantly. Type any value with its unit — no category selection needed.

Unit Converter

Engineering Unit Converter

The converter handles pressure, temperature, torque, length, force, and area. Use the Auto tab for quick fuzzy matching, or select a category for a structured view.

Accepts common abbreviations — psi, bar, MPa, °C, °F, N·m, ft·lbf (foot-pounds), mm, inches, and more.

Quick:
Pipe Size Reference

DN ↔ NPS Cross-Reference

Cross-reference between metric DN (Diameter Nominal) and imperial NPS (Nominal Pipe Size). For full flange dimensions, see our Standard Dimensions & Sizes page.

DN (mm)
NPS (inches)
Pipe OD — Outside Diameter (mm)
15
½"
21.3
20
¾"
26.7
25
1"
33.4
32
1¼"
42.2
40
1½"
48.3
50
2"
60.3
65
2½"
73.0
80
3"
88.9
100
4"
114.3
150
6"
168.3
200
8"
219.1
250
10"
273.1
300
12"
323.9
350
14"
355.6
400
16"
406.4
450
18"
457.2
500
20"
508.0
600
24"
609.6

Need Technical Assistance?

Our engineering team can help with material selection, dimensional queries, and gasket specification for your application.

  • Custom conversions for your specifications
  • Material selection guidance
  • Technical data sheets on request

Disclaimer

This tool is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.