Paint, Resin & Polymer Compounding worked example

Formula Margin at 25% target margin rate: a worked example in paint, resin & polymer compounding

Here is what the math looks like when conditions slip. We hold every other input steady and drop target margin rate to 25%, then walk the calculation through step by step. Calculate the gross margin percentage of a paint or resin formula from margin per gallon and selling price, and compare it against your target.

The inputs for this scenario

  • Gross margin per gallon: 9 $ / gal (held at the documented default)
  • Selling price per gallon: 30 $ / gal (held at the documented default)
  • Target margin rate: 25 % (the input this scenario stresses; the baseline uses 35)

Working through the calculation

  • The calculation starts from the formula this tool documents: Formula margin rate = gross margin per gallon / selling price per gallon * 100.
  • Formula margin rate works out to 30 % at these inputs, and this is the headline figure for the scenario.
  • Gap to target margin works out to -5 points at these inputs.
  • Gross margin per gallon works out to 9 $ / gal at these inputs.
  • Selling price per gallon works out to 30 $ / gal at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target margin rate sits at 35% and the headline result is 30 %, this scenario lands almost exactly on the baseline at 30 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target margin rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It uses a single gross-margin figure you supply, so it is only as accurate as your cost build-up — it will not catch under-absorbed overhead, freight, or waste allowances left out of that number.

Results at a glance

  • Formula margin rate: 30 % (headline result)
  • Gap to target margin: -5 points
  • Gross margin per gallon: 9 $ / gal
  • Selling price per gallon: 30 $ / gal

Run it with your numbers

  • To rerun this with your own numbers, open the live Formula Margin calculator, set target margin rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.