Rubber, Tires, Foam & Elastomer Manufacturing worked example

Rubber Compound Cost at 99% yield after mixing scrap: a worked example

This scenario runs the rubber compound cost calculation on the strong side: 99% yield after mixing scrap, with every other input held at its documented default. A compounding engineer uses it to cost a Banbury batch when quoting a molded or extruded rubber part.

The inputs for this scenario

  • Compound batch weight: 500 kg (unchanged)
  • Compound price per kg: 3.8 $/kg (unchanged)
  • Yield after mixing scrap: 99 % (raised for this scenario; the documented default is 94)
  • Mixing and Banbury setup charge: 180 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Compound cost = compound kg x price/kg x yield% + mixing setup) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,061 $ for total rubber compound cost, the number this scenario is built around.
  • At this operating point the engine returns 4.12 $ / piece for rubber compound cost per unit.
  • At this operating point the engine returns 1,881 $ for variable rubber compound cost.
  • At this operating point the engine returns 180 $ for fixed rubber compound cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where yield after mixing scrap sits at 94% and the headline result is 1,966 $, this scenario comes in 4.83% above the baseline at 2,061 $.
  • Use it when quoting a compound, sizing a batch, or checking whether a formulation or scrap change moves your material cost. 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

  • Total rubber compound cost: 2,061 $ (headline result)
  • Rubber compound cost per unit: 4.12 $ / piece
  • Variable rubber compound cost: 1,881 $
  • Fixed rubber compound cost adder: 180 $

Run it with your numbers

  • Every input above is editable in the live Rubber Compound Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.