Blow Molding & Hollow Plastic Products worked example

Bottle Weight Variation with nominal bottle weight of 26 g: a worked example in blow molding & hollow plastic products

Suppose nominal bottle weight falls to 26 g. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate total bottle weight variation exposure across a sample or run from nominal bottle weight, measured variation, bottle count, and conversion basis.

The inputs for this scenario

  • Nominal bottle weight: 26 g (the input this scenario stresses; the baseline uses 52)
  • Measured weight variation share: 0.04 fraction (held at the documented default)
  • Bottles represented (production run): 10,000 bottles (held at the documented default)
  • Unit conversion multiplier: 1 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Bottle weight variation per represented unit = nominal bottle weight × measured weight variation share.
  • Total bottle weight variation exposure works out to 9,100 g or lb at these inputs, and this is the headline figure for the scenario.
  • Weight variation before conversion works out to 9,100 g or lb at these inputs.
  • Unit conversion multiplier works out to 1 x at these inputs.
  • Bottle weight variation per represented unit works out to 0.91 g or lb at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where nominal bottle weight sits at 52 g and the headline result is 18,200 g or lb, this scenario comes in 50% below the baseline at 9,100 g or lb.
  • It multiplies a bottle's nominal weight by its measured variation share to get per-bottle drift, then scales that across the bottles represented and a unit conversion multiplier to yield total weight variation exposure. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Total bottle weight variation exposure: 9,100 g or lb (headline result)
  • Weight variation before conversion: 9,100 g or lb
  • Unit conversion multiplier: 1 x
  • Bottle weight variation per represented unit: 0.91 g or lb

Run it with your numbers

  • To rerun this with your own numbers, open the live Bottle Weight Variation calculator, set nominal bottle weight to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.