3-Ply Laminate GSM Calculator
Calculate the basis weight of a three-layer laminate, including dry adhesive used at up to two bonding interfaces. Inspect each material contribution rather than applying one density to the whole structure.
3 films. 2 adhesive interfaces.
Typical density. Actual density varies by resin grade and formulation; use supplier or measured data when available. Measured or supplier GSM is generally more reliable than a density-derived estimate. For custom materials, enter a verified density. Do not use a generic density to estimate paper GSM.
Adhesive, print & coatings
Enter zero for an excluded addition. All GSM inputs are dry, retained mass per square meter. Adhesive, ink and coating thickness is not inferred from their GSM.
Dry retained coat weight
Dry retained coat weight
Dry retained mass
Dry retained mass
Dry retained mass
- Film layers
- 96.18 g/m²
- Adhesive, ink, coating & other
- 4.00 g/m²
- Laminate yield
- 9.98 m²/kg
- Film thickness only
- 81.00 µm
- Weight per 1,000 m²
- 100.180 kg
| Layer / addition | Dry GSM |
|---|---|
| 1. PET / BOPET | 16.68 |
| 2. Aluminium foil | 24.30 |
| 3. PE (generic) | 55.20 |
| Adhesive interface 1 | 2.00 |
| Adhesive interface 2 | 2.00 |
| Ink · excluded | 0.00 |
| Coating · excluded | 0.00 |
| Other retained material · excluded | 0.00 |
| Total | 100.18 |
Film thickness excludes adhesive, ink and coating thickness. Yield is theoretical, before process waste. This estimate includes typical library densities.
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Save to a product project (optional)
Choose or create a saved product project ↗Formula & substituted values
Layer GSM = thickness in µm × density in g/cm³.
Total GSM = sum of film-layer GSM + dry adhesive + ink + coatings + other retained mass.
Yield = 1,000 ÷ total GSM.
PET / BOPET: 12.00 × 1.39 = 16.68 g/m²
Aluminium foil: 9.00 × 2.7 = 24.30 g/m²
PE (generic): 60.00 × 0.92 = 55.20 g/m²
Total: 16.68 + 24.30 + 55.20 + 4.00 additions = 100.18 g/m²
Yield: 1,000 ÷ 100.18 = 9.98 m²/kg
The formula, made clear.
A three-ply film may combine materials with substantially different densities, so each layer must be calculated from its own thickness and density. Enter the dry adhesive coat weight separately for each interface; the engine adds those retained amounts to the film-layer total. Aluminium, when used as a material layer, contributes its own thickness-derived mass; it is not treated as a weightless barrier description.
How to use this calculator
- 01
Define all three material layers and check their thickness and density values.
- 02
Enter each interface’s dry adhesive coat weight, using zero for an excluded interface.
- 03
Add any known print or coating mass and review complete-film GSM.
A calculation you can check
The example constructs a three-material laminate and includes the entered total dry adhesive mass in its estimated basis weight.
Use Load example in the tool above. The displayed inputs, calculation breakdown and results form a live, auditable worked example.
Check the displayed formula and units against your quotation. Use measured GSM, net weight and actual layout dimensions where available. Default densities are planning assumptions, not certified material properties. Calculated cost does not certify strength, compatibility or safe loading.
Method, units and material assumptions ↗