Laminate Weight Calculator

Calculator Inputs

Use the responsive grid below. It shows three columns on large screens, two on medium screens, and one on mobile screens.

Unit System

Metric uses mm, kg/m³, and g/m². Imperial uses inches, lb/ft³, and oz/ft².

Material Preset

Density (kg/m³)

Use finished laminate density, not raw resin density.

Panel Length (mm)

Panel Width (mm)

Panel Count

Number of Layers

Thickness per Layer (mm)

Coating / Added Surface Mass (g/m²)

Enter combined added mass for paint, gel coat, film, or adhesive.

Scrap Allowance (%)

Cutout Length (mm)

Cutout Width (mm)

Cutout Quantity per Panel

Example Data Table

This sample shows how the calculator behaves for a typical composite panel estimate.

Unit	Material	Length	Width	Layers	Ply Thickness	Density	Coating	Scrap	Cutouts	Panels	Estimated Total Weight
Metric	GFRP	1200 mm	800 mm	6	0.35 mm	1850 kg/m³	250 g/m²	6%	2 × 120 × 80 mm	4	16.49 kg

Formula Used

1. Gross Area per Panel
Gross Area = Length × Width

2. Cutout Area per Panel
Cutout Area = Cutout Length × Cutout Width × Cutout Quantity

3. Net Area per Panel
Net Area = Gross Area − Cutout Area

4. Total Laminate Thickness
Total Thickness = Thickness per Layer × Number of Layers

5. Volume per Panel
Volume = Net Area × Total Thickness

6. Base Laminate Weight
Base Weight = Volume × Density

7. Coating or Added Surface Weight
Added Weight = Net Area × Added Surface Mass

8. Scrap Allowance
Scrap Weight = (Base Weight + Added Weight) × Scrap %

9. Final Weight
Final Weight per Panel = Base Weight + Added Weight + Scrap Weight

10. Batch Weight
Total Batch Weight = Final Weight per Panel × Panel Count

This method estimates finished laminate mass from net geometry, stacked thickness, material density, optional coating load, and process scrap. For best accuracy, use density values measured from your cured laminate system.

How to Use This Calculator

Select the unit system that matches your drawing or job sheet.
Pick a material preset or enter a custom finished laminate density.
Enter panel length, width, number of panels, and number of layers.
Provide thickness per layer to build the total laminate thickness.
Add optional coating mass for paint, film, or adhesive systems.
Enter scrap allowance to reflect trimming, overlap, and manufacturing loss.
Add repeated rectangular cutouts if holes or windows reduce usable area.
Press the calculate button to see the result above the form.
Review the chart, then export the result as CSV or PDF.

Frequently Asked Questions

1. What does this calculator estimate?

It estimates laminate weight from panel size, stacked thickness, material density, surface additions, scrap allowance, and repeated cutouts. It is useful for fabrication planning, transport estimates, and material comparisons.

2. Should density represent the raw resin or finished laminate?

Use the finished laminate density whenever possible. That value already reflects the cured material system and gives more accurate mass results than resin-only or fiber-only density values.

3. Why is thickness entered per layer?

Thickness per layer makes stacked laminate modeling easier. The calculator multiplies layer thickness by the number of layers to estimate total build thickness before computing volume and weight.

4. How are cutouts handled?

Each rectangular cutout removes area from one panel. The calculator subtracts total cutout area before computing volume, coating mass, and final weight.

5. What should I enter for coating mass?

Enter the combined surface mass added by gel coat, adhesive film, paint, protective skin, or similar layers. If there is no added surface mass, enter zero.

6. Does the scrap allowance increase only the laminate mass?

No. In this model, scrap allowance is applied to the subtotal of base laminate weight and added surface mass. That better reflects real purchased or processed material demand.

7. Can I use this for FR-4, phenolic, or decorative laminates?

Yes. The calculator works for any solid laminate if you use the correct finished density and realistic thickness values. Material presets help you start faster.

8. Why do my results differ from shop floor weight?

Real parts may include edge rounding, inserts, variable resin distribution, trapped moisture, overlap, hardware, or packaging. Adjust density, coating mass, and scrap percentage to match your process.