How do you calculate powder transfer efficiency?

Divide the weight of powder deposited on parts by the weight of powder sprayed from the guns. Depositing 42 lb from 60 lb sprayed gives 70 percent transfer efficiency.

What is a good powder coating transfer efficiency?

With reclaim, well-run systems reach 60-70 percent first-pass and 95 percent-plus overall. Spray-to-waste lines often sit at 40-60 percent. The example's 70 percent is a strong first-pass number.

Why is my transfer efficiency low?

Poor part grounding, worn electrodes, too much air, excessive gun-to-part distance, or complex recessed geometry all drive first-pass efficiency down and overspray up.

Does reclaim change transfer efficiency?

Reclaim doesn't change first-pass transfer efficiency, but it recovers overspray so your effective material utilization can exceed 95 percent even when first-pass sits at 70.

How much powder am I wasting at 70 percent?

At 70 percent, 30 percent of sprayed powder becomes overspray. In the example that is 18 lb of the 60 lb sprayed; without reclaim that is straight material loss.

How do I close the gap to my target?

Check ground continuity, reduce atomizing and flow air, tune kV for the part, and shorten gun-to-part distance. Small changes often recover several points quickly.

Finishing calculator

Powder Transfer Efficiency Calculator

Powder Transfer Efficiency measures how much of the powder leaving your guns actually ends up cured on the part versus what is lost as overspray. Finishing engineers and line supervisors track it because reclaim, gun tuning, ground quality, and part geometry all move this number, and it directly drives powder cost per square foot. A booth running at 70 percent first-pass efficiency wastes far less reclaim energy and virgin powder than one at 45 percent. This calculator compares deposited weight to sprayed weight and shows how far you sit from your target.

What this calculator does

Calculate how much sprayed powder deposits on parts instead of becoming overspray.
Use to benchmark gun settings, grounding, part geometry, reclaim performance, and operator technique.
It computes transfer efficiency as powder deposited on parts divided by powder sprayed, plus the point gap to your target.

Formula used

Transfer efficiency = powder deposited on parts ÷ powder sprayed
Gap to target = target transfer efficiency - transfer efficiency

Inputs explained

Powder deposited on parts:
Powder sprayed from guns:
Target transfer efficiency:

How to use the result

Use it after a booth audit or gun changeover to verify how much sprayed powder is actually building film on the parts.
Weighing deposited powder accurately is hard; if you estimate deposited weight from film build rather than measuring it, the efficiency figure inherits that error.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
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 powder transfer efficiency? Divide the weight of powder deposited on parts by the weight of powder sprayed from the guns. Depositing 42 lb from 60 lb sprayed gives 70 percent transfer efficiency.
What is a good powder coating transfer efficiency? With reclaim, well-run systems reach 60-70 percent first-pass and 95 percent-plus overall. Spray-to-waste lines often sit at 40-60 percent. The example's 70 percent is a strong first-pass number.
Why is my transfer efficiency low? Poor part grounding, worn electrodes, too much air, excessive gun-to-part distance, or complex recessed geometry all drive first-pass efficiency down and overspray up.
Does reclaim change transfer efficiency? Reclaim doesn't change first-pass transfer efficiency, but it recovers overspray so your effective material utilization can exceed 95 percent even when first-pass sits at 70.
How much powder am I wasting at 70 percent? At 70 percent, 30 percent of sprayed powder becomes overspray. In the example that is 18 lb of the 60 lb sprayed; without reclaim that is straight material loss.

Last reviewed 2026-05-12.