Where do I get theoretical usage?

Use the product data sheet at the specified film thickness. If it lists ft² per gallon, take its reciprocal; theoretical usage must exclude spray loss to avoid counting it twice.

How is transfer efficiency measured?

Measure deposited coating solids divided by sprayed coating solids and multiply by 100. Use a representative run with the same tube geometry, coating and application setup.

Can I use this for powder reclaim?

No. This model estimates liquid gallons with unreclaimed spray loss. Powder systems need mass coverage and total utilization that includes recovered powder.

Why can 25% spray loss add more than 25%?

Because transfer loss is a fraction of the sprayed amount. At 75% transfer, you divide theoretical gallons by 0.75, giving about 33.3% more liquid than the theoretical amount.

Tube, Pipe & Profile Forming calculator

Coating Material Requirement Calculator

Size liquid coating for the tube area at your specified film thickness. Enter theoretical usage, measured solids transfer efficiency and usable coating stock.

What this calculator does

Estimate liquid coating gallons for tube surface area, including measured spray loss and available stock.

Formula used

Theoretical coating (gal) = coated area × theoretical usage (gal/ft²)
Required coating (gal) = theoretical coating ÷ (transfer efficiency ÷ 100)
Spray loss (gal) = required coating − theoretical coating
Stock headroom (gal) = available coating − required coating

Inputs explained

Coated Surface Area: Total area to coat from CAD or the coating takeoff.
Theoretical Coating Usage: Data-sheet usage at specified film thickness before spray loss.
Spray Transfer Efficiency: Measured coating solids deposited divided by coating solids sprayed.
Available Coating: Usable mixed liquid coating available for this run.

How to use the result

Best suited to tube finishing purchase Quantity, spray method cost comparison.
Mixing, pot, hose and cleanup losses are excluded. Powder reclaim needs a utilization model rather than this liquid-gallon estimate.

Current U.S. benchmarks

The producer price index for steel mill products stands at 381.162 (BLS, Aug 2026), up 23.4% from a year earlier. Quotes priced off last quarter's material cost miss this move.

Common questions

Where do I get theoretical usage? Use the product data sheet at the specified film thickness. If it lists ft² per gallon, take its reciprocal; theoretical usage must exclude spray loss to avoid counting it twice.
How is transfer efficiency measured? Measure deposited coating solids divided by sprayed coating solids and multiply by 100. Use a representative run with the same tube geometry, coating and application setup.
Can I use this for powder reclaim? No. This model estimates liquid gallons with unreclaimed spray loss. Powder systems need mass coverage and total utilization that includes recovered powder.
Why can 25% spray loss add more than 25%? Because transfer loss is a fraction of the sprayed amount. At 75% transfer, you divide theoretical gallons by 0.75, giving about 33.3% more liquid than the theoretical amount.

Last reviewed 2026-10-06.