How do you calculate conversion coating cost?

Multiply parts coated by the coating cost per part and scale by first-pass yield, then add the fixed line setup charge. With 500 parts at $1.85, a 92% yield, and a $120 setup, that is 500 x 1.85 x 0.92 = $851 variable plus $120 fixed, for a $971 total run cost.

What is a good conversion coating cost per part?

For aluminum chromate or non-chrome pretreatment on small-to-medium parts, most shops land between $0.50 and $3.00 per part fully racked; the worked example returns $1.94 per part. Anything higher usually points to short runs where the setup charge dominates, low yield, or hand-applied brush-on coatings.

Why does first-pass yield lower my variable cost here?

The yield factor represents the share of parts that pass the first time and are actually billable coated output; at 92% the $925 theoretical variable cost drops to the $851 you can realistically charge or recover. Parts that fail need stripping and recoating, which this line item does not separately bill.

How can I reduce conversion coating cost per part?

Batch more parts per rack to spread the $120 setup charge, tighten pre-clean and deox control to push first-pass yield above 95%, and control drag-out and bath chemistry to cut chemical spend per part. Larger runs move the per-part figure toward the pure variable rate.

Chromate vs non-chrome conversion coating cost?

Non-chrome chemistries often carry a higher per-part chemical cost and can need tighter bath control, but they cut hexavalent-chrome waste-treatment and compliance overhead. Run both through this calculator with their real per-part cost and yield to compare total run cost rather than sticker price alone.

Does this include the paint or topcoat cost?

No. This calculator covers only the conversion coating pretreatment step. The downstream primer, topcoat, or adhesive bond is a separate cost you should add to get a full finished-part price.

Plating, Anodizing & Surface Treatment calculator

Conversion Coating Cost Calculator

Conversion coating cost tracks what a chromate, phosphate, or Alodine/Alumiprep pretreatment line actually costs per part and per run, blending the variable chemistry-and-labor cost with the fixed charge to set up a rack or make up a bath. Process engineers, job-shop estimators, and quality managers use it to quote pretreatment ahead of paint or adhesive bonding and to see how scrap at the coating stage erodes margin. Because conversion coatings are usually a low-dollar step feeding a much more expensive paint or bond, a small per-part swing multiplied across thousands of parts decides whether the line runs profitably. It matters most when first-pass yield is soft, since parts that fail salt-spray or tape-adhesion get stripped and recoated.

What this calculator does

Estimate the total cost of applying a chemical conversion coating to a lot of parts including chemistry, immersion handling and a flat line setup charge.
Use it when quoting chromate or phosphate conversion coating on aluminum or steel parts and you need a defensible per-part and per-lot number.
It computes the total conversion coating run cost and the effective cost per part from parts coated, per-part coating cost, first-pass yield, and a one-time line setup charge.

Formula used

Total = parts coated x coating cost per part x first-pass yield% + line setup charge
Cost per part = total conversion coating cost / parts coated

Inputs explained

Parts Coated:
Coating Cost per Part:
First-Pass Yield:
Line Setup Charge:

How to use the result

Use it when quoting a pretreatment step, comparing chromate against non-chrome chemistries, or building a standard cost for parts that pass through a conversion coating line before paint or bonding.
It models yield as a simple multiplier on variable cost and does not break out stripping and recoat labor, bath make-up amortization, or waste-treatment cost, so treat the per-part figure as a planning estimate rather than a fully burdened rate.

Current U.S. benchmarks

The producer price index for industrial chemicals stands at 344.336 (BLS, May 2026), up 16.1% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate conversion coating cost? Multiply parts coated by the coating cost per part and scale by first-pass yield, then add the fixed line setup charge. With 500 parts at $1.85, a 92% yield, and a $120 setup, that is 500 x 1.85 x 0.92 = $851 variable plus $120 fixed, for a $971 total run cost.
What is a good conversion coating cost per part? For aluminum chromate or non-chrome pretreatment on small-to-medium parts, most shops land between $0.50 and $3.00 per part fully racked; the worked example returns $1.94 per part. Anything higher usually points to short runs where the setup charge dominates, low yield, or hand-applied brush-on coatings.
Why does first-pass yield lower my variable cost here? The yield factor represents the share of parts that pass the first time and are actually billable coated output; at 92% the $925 theoretical variable cost drops to the $851 you can realistically charge or recover. Parts that fail need stripping and recoating, which this line item does not separately bill.
How can I reduce conversion coating cost per part? Batch more parts per rack to spread the $120 setup charge, tighten pre-clean and deox control to push first-pass yield above 95%, and control drag-out and bath chemistry to cut chemical spend per part. Larger runs move the per-part figure toward the pure variable rate.
Chromate vs non-chrome conversion coating cost? Non-chrome chemistries often carry a higher per-part chemical cost and can need tighter bath control, but they cut hexavalent-chrome waste-treatment and compliance overhead. Run both through this calculator with their real per-part cost and yield to compare total run cost rather than sticker price alone.

Last reviewed 2026-05-12.