Finishing calculator
Powder Coating Coverage Calculator: Pounds for the Job
Size the powder order for a job from area, target build and first-pass transfer efficiency. The calculator separates powder sprayed from net virgin powder purchased after reclaim.
What this calculator does
- Pounds of powder a job needs, split into deposited, overspray, and net virgin after reclaim.
Formula used
- Powder deposited = coated area × powder per ft² at target build
- Powder to spray = powder deposited ÷ first-pass transfer efficiency
- Overspray = powder to spray − powder deposited
- Net virgin powder = powder to spray − overspray × recovery share
- Powder per ft² = specific gravity × mils ÷ 192.3
Inputs explained
- Coated Surface Area: Total area to coat: part area times part count.
- Powder Use at Target Mil Build: Pounds deposited per ft² at the target build, from the TDS.
- First-Pass Transfer Efficiency: Share bonding to the part on the first pass, before reclaim.
- Overspray Recovered for Reuse: Share of overspray the reclaim system returns as usable powder.
How to use the result
- Best suited to ordering powder for a defined job, pricing reclaim versus spray-to-waste, sanity-checking a TDS coverage claim.
- Reclaimed powder is not equivalent: particle size drifts, so shops blend it back at a controlled ratio. One efficiency number cannot see geometry mix; racks of channels and flats differ by tens of points. Color-change purge losses are outside the model and can rival overspray on short runs.
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.
- The producer price index for industrial chemicals stands at 336.006 (BLS, Aug 2026), up 13.3% 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 much powder do I need per square foot? From theory: specific gravity × mils ÷ 192.3 gives pounds per ft² deposited. A 1.5 specific-gravity powder at 2 mils needs 0.0156 lb/ft²; divide by first-pass efficiency for the sprayed quantity.
- What transfer efficiency should I use? Measured, first-pass, for your geometry. Manual guns on complex parts run 40 to 60%, automated guns on open work 60 to 75%. A number borrowed from another line is a guess.
- How does reclaim change how much powder I buy? Reclaim returns a share of overspray to the hopper, cutting virgin powder purchased without changing powder sprayed. At the defaults, 85% recovery drops the order from 25 lb to 18.6 lb.
- Why is my powder consumption higher than predicted? Usually the real build runs above the specified mils, first-pass efficiency below the entered figure, or reclaim recovery weaker than assumed. Purge losses on color changes are not modeled.
Related guides
Last reviewed 2026-10-01.