Plastic Square Tube Weight Calculator

Summary

Enter outer side size, wall thickness, length, and plastic density to instantly get the weight of a plastic square tube in kg and lb.

How it works

1. Enter the outer side size of the square tube and choose a unit (mm, cm, or in).
2. Enter the wall thickness and choose a unit (mm, cm, or in).
3. Enter the tube length and choose a unit (mm, cm, m, in, or ft).
4. Select a plastic material preset or choose Custom to enter your own density in kg/m³.
5. Click Calculate — the inner side is derived as Inner = Side − 2 × Wall.
6. Weight is displayed in kilograms and pounds along with cross-section and volume details.

Use cases

• Estimating material weight for plastic square tube framing and structural assemblies.
• Calculating shipping and freight weight for plastic tube orders.
• Comparing different plastic materials by weight to balance cost and performance.
• Preparing a bill of materials for fabrication or purchasing.
• Evaluating load-bearing and handling requirements before installation.
• Quick field estimation of plastic tube weight without manual calculation.
• Selecting the right wall thickness to achieve a target weight or stiffness.

Frequently Asked Questions