Thermoforming Sheet Weight Calculator
Estimate thermoforming sheet basis weight, area and mass from width, length, thickness and density.
Use a saved product specification (optional)
Enter your values
First time using this calculator?
Replace the example values with figures from your supplier sheet or measurements. Choose the unit beside each value. Results update as you type; fix any highlighted field before using the result.
GSM means grams per square metre. Net weight excludes the core and other packaging. MOQ means the minimum order quantity. An optional field can stay blank unless the result you need depends on it.
Prices keep the selected currency; changing its label does not convert an exchange rate. Save or export the result after checking your inputs.
Help with sheet / web width
Measure the full width of the flat material from edge to edge, rather than the width of one finished pack. Choose the matching unit.
Help with sheet thickness
Use the measured or specified material thickness. One micron (µm) is one thousandth of a millimetre.
Illustrative density. Use the actual polymer / formulation specification.
Help with actual or assumed sheet density
Density is material mass per unit volume. A typical preset is suitable for an early estimate; use the supplier grade value for purchasing decisions.
Typical density. Actual density varies by resin grade and formulation. You can edit the value above.
Sheet / web material weight
Density is entered, not inferred from a finished part. Foamed or multilayer sheets may require measured effective density or actual GSM.
GSM = thickness (µm) × density; kg = width (m) × length (m) × GSM ÷ 1,000
500 × 1.35 = 675 g/m²; 0.8 × 1,000 × 675 ÷ 1,000 = 540 kgSaved calculations stay in this browser. No account or cloud backup is created.
Save to a product project (optional)
Choose or create a saved product project ↗This is an illustrative example. Saved or transferred values must be checked against your job.
Calculated from your inputs. Confirm specifications with your supplier.
How sensitive is this result to your assumptions?
Vary one input and inspect sheet / web material weight
All other entered inputs stay fixed. Ranges are your scenarios, not statistical confidence or supplier performance predictions. This uses the same validated calculator engine.
The formula, made clear.
The thickness-density relationship establishes the sheet’s average basis weight. Width and length determine area, and area multiplied by GSM gives material mass. Use thickness and density for the complete sheet represented by the calculation. For a multilayer or foamed sheet, a single unverified solid-polymer density may not represent its effective mass correctly.
How to use this calculator
- 01
Enter sheet or web width and length.
- 02
Enter total thickness and a verified or explicitly estimated density.
- 03
Review calculated GSM, area and net sheet mass.
A calculation you can check
The example establishes the gross material mass available in a thermoforming web before forming and trimming.
- Sheet / web width
- 800 mm
- Sheet / web length
- 1000 m
- Sheet thickness
- 500 µm
- Actual or assumed sheet density
- 1.35 g/cm³
500 × 1.35 = 675 g/m²; 0.8 × 1,000 × 675 ÷ 1,000 = 540 kgCheck 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 ↗