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Round Steel Tubing Sizes | Tube Sizes Guide

round steel tubing sizes

The sizes listed below are for standard tube production. If you have custom engineering or requests, your metal manufacturer may be able to make them work too, depending on its engineers' skill level.

Round steel tubing is perfect for many structural, industrial, and consumer goods projects. Not sure which type of steel is best for your project? Check out these articles on tubing applications:

If you're ready to jump in, here's your round steel tubing sizes guide!

Round Steel Tubing Sizes | Tube Sizes Guide

Standard round steel tubing sizes are outlined below. These sizes apply to stainless steel, carbon and mild steel, and galvanized steel. Your local metal manufacturer may also offer tube production and fabrication for aluminum tubing. 

To calculate approximate shipping weight, identify your material and use the following formulas:

  • Mild Carbon Steel: 10.700 x (outer diameter - wall thickness) x wall thickness
  • 304 Stainless Steel: 10.930 x (outer diameter - wall thickness) x wall thickness
  • 6061 Aluminum: 3.690 x (outer diameter - wall thickness) x wall thickness


For other tubing shapes, download the full Tube Sizing Chart here. For other material species, contact us for more information.

Round Steel Tubing Sizes (OR CLICK HERE FOR THE Full Guide)

All measurements are in inches.

Outer Diameter

Wall ThicknesS

Outer Diameter 

Wall ThicknesS

0.500 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.

1.225 in.

0.025 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
0.625 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
1.250 in. 0.025 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
0.750 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
1.312 in. 0.030 in.
0.049 in.
0.065 in.
0.083 in.
0.875 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
1.500 in. 0.030 in.
0.049 in.
0.065 in.
0.083 in.
0.946 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
1.575 in. 0.035 in.
0.049 in.
0.065 in.
0.083 in.
1.000 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
1.625 in. 0.035 in.
0.049 in.
0.065 in.
0.083 in.
1.090 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
2.000 in. 0.042 in.
0.065 in.
0.083 in.
1.125 in. 0.020 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
2.460 in. 0.049 in.
0.065 in.
0.083 in.
1.190 in. 0.025 in.
0.030 in.
0.049 in.
0.065 in.
0.083 in.
2.500 in. 0.049 in.
0.065 in.
0.083 in.


For rectangular, square, and other tubing shapes, get a free, full, downloadable guide below by clicking the graphic. The Tube Sizing Quick Reference Guide will tell you all you need to know about steel tubing dimensions.

Open the tube sizing chart to find:
  • The most common tube shapes and sizes
  • Information on aluminum, stainless steel, and mild carbon steel 
  • How to get a ballpark shipping weight
  • Common definitions and formulas for tube production

Understanding steel tube sizing doesn't have to be a difficult process -- let the guide help you in your search for the perfect tubing:

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(This article was originally published in April 2017 and was recently updated.)

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