Which plastics are supported?

ABS, PVC (rigid), acrylic (PMMA), polycarbonate (PC), HDPE, LDPE, nylon (PA6), and PTFE (Teflon). Each material uses its standard nominal density.

How accurate is the result?

The result matches supplier data within ~1–2% for standard grades. Actual density can vary slightly with additives or grade variants; always confirm with your material data sheet for critical applications.

Can I use inches instead of millimeters?

Yes. Switch to Imperial mode and enter dimensions in inches. The calculator converts internally and still returns weight in both kg and lb.

What formula is used?

Weight = Length × Width × Thickness × Density. Volume in cubic centimeters multiplied by g/cm³ gives grams, then converted to kg and lb.

Does this work for round or irregular sheets?

No — this tool is for rectangular flat sheets only. For other shapes, calculate the actual area in cm² manually and multiply by thickness (cm) and density (g/cm³).

Plastic Sheet Weight Calculator

Name: Plastic Sheet Weight Calculator
Availability: InStock
Author: Nham Vu

Calculate the weight of a flat plastic sheet from its dimensions and material type.

Sheet Dimensions

Material

Length (mm)

Width (mm)

Thickness (mm)

Result

Enter dimensions and click Calculate

Material Density Reference

Material	Density (g/cm³)	Common Uses
ABS	1.05	Enclosures, prototypes, automotive trim
PVC (rigid)	1.40	Signage, plumbing panels, chemical tanks
Acrylic / PMMA	1.18	Display cases, windows, light diffusers
Polycarbonate (PC)	1.20	Safety glazing, machine guards, roofing
HDPE	0.95	Cutting boards, marine, chemical storage
LDPE	0.92	Flexible liners, packaging, film
Nylon / PA6	1.14	Gears, bushings, structural parts
PTFE (Teflon)	2.20	Seals, bearings, chemical resistance

Summary

Calculate the weight of a flat plastic sheet from its dimensions and material type.

How it works

Select the plastic material from the dropdown.
Enter the sheet length and width in millimeters or inches.
Enter the sheet thickness in millimeters or inches.
Choose your preferred unit system (metric or imperial).
The calculator instantly shows the weight in both kg and lb.

Use cases

Estimate shipping weight for plastic sheet orders.
Check structural load contributions in fabrication projects.
Compare material weight across different plastic types.
Calculate material cost when pricing is per kilogram.
Verify supplier weight specifications against dimensions.
Plan CNC or laser-cutting job costing.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu