Why does cost per square foot fall as area grows?

Fixed setup and masking spreads over more square feet, so the blended rate drops even though the material rate holds. At these defaults, halving the area lifts the per-square-foot cost from 3.50 to 4.50 dollars.

Does coating thickness enter this calculator?

Not directly. The material cost per square foot stands for the full coat system at its specified thickness, so a thicker system needs a higher rate entered.

What belongs in the labor and overhead adder?

Application time, surface preparation not already in the material rate, booth time and shop overhead for the job. Keep it a lump sum so the per-square-foot math stays clean.

Is coating volume in gallons used anywhere?

No. Coverage is priced per square foot here, so gallons, overspray and waste are not modeled. Convert a coverage rate to dollars per square foot before you enter it.

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Protective Coating Cost Calculator

Estimate coating cost from the surface area, a material cost per square foot, fixed setup and masking, and a labor and overhead adder. The verdict compares the blended cost per square foot with your target.

What this calculator does

Total protective coating cost from area, a material rate, fixed setup and masking and a labor adder, against a target per square foot.

Formula used

Material cost = coating area × coating material cost per square foot
Total coating cost = material cost + fixed setup and masking cost + labor and overhead adder
Cost per square foot = total coating cost ÷ coating area
Cost per square foot vs target = target cost per square foot − cost per square foot

Inputs explained

Surface Area to Coat: Surface to coat in square feet, one side per entry.
Coating Material Cost per Square Foot: Loaded material cost for one square foot of the coat system.
Fixed Setup and Masking Cost: Setup and masking that does not change with area.
Labor and Overhead Adder: Lump sum for application labor and shop overhead.
Target Cost per Square Foot: Blended cost per square foot to stay under.

How to use the result

Best suited to quoting blast and coating on a vessel, comparing a touch-up with a full coat, checking a coating rate against a target.
Dry film thickness, coat count and coating volume in gallons are not modeled. No mass or gas condition conversion enters the cost; area and dollars are the basis. At zero area the per-square-foot rows are blank and the adders stand alone.

Current U.S. benchmarks

Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
Steel mill PPI stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. New factory orders are up 8.5% year over year (Census).

Common questions

Why does cost per square foot fall as area grows? Fixed setup and masking spreads over more square feet, so the blended rate drops even though the material rate holds. At these defaults, halving the area lifts the per-square-foot cost from 3.50 to 4.50 dollars.
Does coating thickness enter this calculator? Not directly. The material cost per square foot stands for the full coat system at its specified thickness, so a thicker system needs a higher rate entered.
What belongs in the labor and overhead adder? Application time, surface preparation not already in the material rate, booth time and shop overhead for the job. Keep it a lump sum so the per-square-foot math stays clean.
Is coating volume in gallons used anywhere? No. Coverage is priced per square foot here, so gallons, overspray and waste are not modeled. Convert a coverage rate to dollars per square foot before you enter it.

Last reviewed 2026-10-01.