Plastic Channel Weight Calculator

Summary

Enter web height, flange width, wall thickness, and length of a plastic C-channel to get the weight in kg and lbs instantly.

How it works

1. Enter the web height (H) — the vertical back wall of the plastic C-section.
2. Enter the flange width (F) — the horizontal projecting lip at the top and bottom.
3. Enter the wall thickness (t) — uniform thickness of both the web and flanges.
4. Enter the total bar length.
5. Select the plastic material from the dropdown, or choose Custom Density for a user-defined value.
6. Optionally enter a quantity for multiple channel bars.
7. Click Calculate — the tool applies Weight = t × (H + 2F − 2t) × Length × Density and displays results in kg and lbs.

Use cases

• Estimating plastic frame weight for cable management and electrical enclosures.
• Calculating shipping and freight weight for plastic extrusion orders.
• Bill of materials (BOM) preparation for plastic fabrication projects.
• Comparing channel sizes to find the lightest design that meets load requirements.
• Cost estimation when pricing plastic sections by weight.
• Checking load limits for plastic guide rails and conveyor components.
• Academic and exam calculations for lightweight structural and mechanical designs.
• Verifying theoretical weight against supplier product data sheets.

Frequently Asked Questions