Rectangular Tube Weight Calculator

If you're working with metal fabrication, construction, or engineering, knowing the weight of a rectangular tube is essential. Whether it's for budgeting, structural analysis, or transportation planning, calculating the weight accurately saves time and resources. That’s why we developed the Rectangular Tube Weight Calculator an easy-to-use tool that helps you find the weight of rectangular, square, or hollow steel tubes in just seconds.

What Is a Rectangular Tube?

A rectangular tube (also known as a rectangular hollow section or RHS) is a steel profile shaped like a rectangle or square. It is commonly used in structural, mechanical, and engineering applications. The weight of the tube depends on the outer dimensions, wall thickness, and the density of the material (usually mild steel or stainless steel).

How to Calculate the Weight of a Rectangular Tube?

The standard formula to calculate the weight of a rectangular tube (RHS or SHS) is:

Weight (kg/m) = (2 × Wall Thickness × (Width + Height − 2 × Wall Thickness)) × Density

Where:

• Wall Thickness is in millimeters (mm)
• Width and Height are outer dimensions in mm
• Density is typically 7.85 g/cm³ or 7850 kg/m³ for mild steel

Example:

Let’s calculate the weight of a 50 mm x 25 mm rectangular tube with a 2 mm wall thickness.

• Width = 50 mm  
• Height = 25 mm  
• Wall Thickness = 2 mm  
• Density = 7850 kg/m³

Weight = (2 × 2 × (50 + 25 − 2×2)) × 7.85 / 1000  

= (4 × (75 − 4)) × 7.85 / 1000  

= (4 × 71) × 7.85 / 1000  

= 284 × 7.85 / 1000  

= 2.23 kg/m

So, a 1-meter tube of this size weighs 2.23 kg.

How to Use the Rectangular Tube Weight Calculator?

Using our Rectangular Tube Weight Calculator is super easy. Here's how:

1. Enter the outer width (e.g., 50 mm)
2. Enter the outer height (e.g., 25 mm)
3. Enter the wall thickness (e.g., 2 mm)
4. Enter the length of the tube (in meters or feet)
5. Click on the Calculate button
6. Instantly get the total weight in kilograms (kg) or pounds (lb)

Our tool works with metric units (mm, kg, meters) and imperial units (inches, lb, feet) for full flexibility.

Final Verdict

The Rectangular Tube Weight Calculator is an essential tool for anyone working with steel tubes. Instead of manually applying complex formulas, you can now get accurate results instantly. This helps reduce calculation errors, saves time, and improves planning accuracy.

Whether you're dealing with MS square tubes, rectangular hollow sections, or custom steel pipes, our calculator makes it all easy. Use it for design, costing, transport planning, or quoting it's built to simplify your workflow.

Frequently Asked Questions

What is the weight of a 50 × 25 rectangular tube?

Using 2 mm wall thickness and mild steel density, the weight is approximately 2.23 kg per meter.

What is the weight of a 4x2 rectangular tube?

A 4" × 2" steel tube (approx. 101.6 mm x 50.8 mm) with 3 mm wall thickness weighs about 6.93 kg per meter.

How much does a 20-foot iron rectangular pipe weigh?

Let’s take the previous 4x2 tube (6.93 kg/m):

20 feet ≈ 6.096 meters

Total Weight = 6.93 × 6.096 ≈ 42.25 kg

Can I use this calculator for square tubes?

Yes, square tubes are just rectangular tubes with equal sides. Enter the same value for height and width.

Does the tool support stainless steel?

Currently, it defaults to mild steel, but you can manually adjust the density if needed (e.g., 8000 kg/m³ for stainless steel).