Gaskets, Seals, O-Rings & Elastomer Components worked example

Rubber Blank Yield at 68% target blank yield: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target blank yield to 68%, then walk the calculation through step by step. Calculate rubber blank yield for sheet-fed gasket, washer, pad, and flat seal production using blank count, sheet or slab count, and a target yield.

The inputs for this scenario

  • Usable rubber blanks: 232 blanks (held at the documented default)
  • Total blank positions or attempts: 250 positions (held at the documented default)
  • Target blank yield: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Rubber blank yield = usable rubber blanks ÷ total blank positions or attempts × 100.
  • Rubber blank yield works out to 92.8 % at these inputs, and this is the headline figure for the scenario.
  • Rubber blank yield gap to target works out to -24.8 points at these inputs.
  • Usable rubber blanks works out to 232 count at these inputs.
  • Total blank positions or attempts works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target blank yield sits at 95% and the headline result is 92.8 %, this scenario lands almost exactly on the baseline at 92.8 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target blank yield, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats every blank as pass/fail and says nothing about why blanks fail or whether a salvageable blank could be reworked into the next batch.

Results at a glance

  • Rubber blank yield: 92.8 % (headline result)
  • Rubber blank yield gap to target: -24.8 points
  • Usable rubber blanks: 232 count
  • Total blank positions or attempts: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Rubber Blank Yield calculator, set target blank yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.