Plating, Anodizing & Surface Treatment worked example

Bath Replacement Cost at 40% active chemistry fraction: a worked example

Push active chemistry fraction up to 40% and the picture changes. This example computes every intermediate figure at that operating point. Use it when a bath has drifted out of spec and you need to weigh the cost of a full replacement against continued additions and treatment.

The inputs for this scenario

  • Bath Volume: 400 gal (unchanged)
  • Chemistry Cost per Gallon: 9.5 $/gal (unchanged)
  • Active Chemistry Fraction: 40 % (raised for this scenario; the documented default is 35)
  • Dump and Disposal Fee: 650 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total = bath volume x chemistry cost per gallon x active chemistry fraction% + dump and disposal fee) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,170 $ for total bath replacement cost, the number this scenario is built around.
  • At this operating point the engine returns 5.43 $ / piece for bath replacement cost per unit.
  • At this operating point the engine returns 1,520 $ for variable bath replacement cost.
  • At this operating point the engine returns 650 $ for fixed bath replacement cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where active chemistry fraction sits at 35% and the headline result is 1,980 $, this scenario comes in 9.6% above the baseline at 2,170 $.
  • It computes the total cost to rebuild a process bath by adding the active-chemistry makeup cost to the fixed dump and disposal fee. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Total bath replacement cost: 2,170 $ (headline result)
  • Bath replacement cost per unit: 5.43 $ / piece
  • Variable bath replacement cost: 1,520 $
  • Fixed bath replacement cost adder: 650 $

Run it with your numbers

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

Last reviewed 2026-05-12.