Thermoforming & Vacuum Formed Products worked example

Sheet Usage Per Part at 61% material transfer efficiency: a worked example

This worked example runs the sheet usage per part numbers for a tougher week than the baseline: 61% material transfer efficiency instead of the typical 85%. Sheet Usage Per Part tells a thermoforming plant how much plastic sheet it must actually buy to fill a run once material lost to trim, sag, and clamp-frame waste is accounted for.

The inputs for this scenario

  • Parts formed per production run: 500 units (held at the documented default)
  • Sheet consumed per part: 0.08 units (held at the documented default)
  • Material transfer efficiency: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Required sheet usage per part = covered amount × use per unit ÷ transfer efficiency.
  • Required quantity works out to 65.57 units at these inputs, and this is the headline figure for the scenario.
  • Theoretical amount works out to 40 units at these inputs.
  • Loss allowance works out to 25.57 units at these inputs.
  • Efficiency works out to 61 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where material transfer efficiency sits at 85% and the headline result is 47.06 units, this scenario comes in 39.34% above the baseline at 65.57 units.
  • Use it when estimating roll or cut-sheet purchases for a thermoforming job, or when reconciling actual material draw against theoretical yield. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Required quantity: 65.57 units (headline result)
  • Theoretical amount: 40 units
  • Loss allowance: 25.57 units
  • Efficiency: 61 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Sheet Usage Per Part calculator, set material transfer efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.