Building Materials Manufacturing worked example

Glass Cullet Ratio with cullet charged to the glass batch of 88 tons: a worked example

This scenario runs the glass cullet ratio calculation on the strong side: cullet charged to the glass batch of 88 tons, with every other input held at its documented default. a glass plant needs to confirm cullet share before charging the furnace

The inputs for this scenario

  • Cullet charged to the glass batch: 88 tons (raised for this scenario; the documented default is 35)
  • Total glass batch charge: 100 tons (unchanged)
  • Percent conversion multiplier: 100 x (unchanged)

Working through the calculation

  • Applying the documented formula (Raw glass cullet ratio = cullet charged to the glass batch รท total glass batch charge) to the inputs above produces each figure below.
  • At this operating point the engine returns 88 % cullet for glass cullet ratio, the number this scenario is built around.
  • At this operating point the engine returns 0.88 value for raw glass cullet ratio.
  • At this operating point the engine returns 100 x for percent conversion multiplier.
  • At this operating point the engine returns 100 value for total glass batch charge.

How this compares with the baseline

  • Against the tool's baseline example, where cullet charged to the glass batch sits at 35 tons and the headline result is 35 % cullet, this scenario comes in 151% above the baseline at 88 % cullet.
  • Use it when setting or auditing a furnace batch recipe, tracking recycled content for ESG reporting, or balancing energy savings against defect risk. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Glass Cullet Ratio: 88 % cullet (headline result)
  • Raw glass cullet ratio: 0.88 value
  • Percent conversion multiplier: 100 x
  • Total glass batch charge: 100 value

Run it with your numbers

  • Every input above is editable in the live Glass Cullet Ratio calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.