Thermal Spray, Hardfacing & Wear Coatings calculator
Gas Consumption Calculator
Gas Consumption converts the area you need to coat into the actual quantity of consumable — powder or process gas — you must load, after accounting for the deposit efficiency that every thermal spray process loses to overspray. Deposit efficiency for HVOF, plasma and combustion spray runs anywhere from roughly 40% to 80%, so the theoretical amount on the part is always well below what you buy. Estimators and material planners use this to order enough carbide or gas, cost a job accurately, and avoid mid-run shortages. It separates the material that lands on the part from the loss allowance you pay for but never deposit.
What this calculator does
- Gas Consumption converts the area you need to coat into the actual quantity of consumable — powder or process gas — you must load, after accounting for the deposit efficiency that every thermal spray process loses to overspray.
- Use it when gas consumption in thermal spray, hardfacing and wear coatings needs a buy quantity for the next thermal spray, hardfacing and wear coatings run and you do not want to short the line.
- It scales coated area by the per-unit draw and divides by transfer efficiency to get required consumable, then reports the loss allowance versus the theoretical amount.
Formula used
- Required gas consumption = covered amount × use per unit ÷ transfer efficiency
- Loss allowance = required amount - theoretical amount
Inputs explained
- Total surface area to coat:
- Powder / gas draw per unit area:
- Deposit / transfer efficiency:
How to use the result
- Use it when ordering powder or gas for a run, costing consumables into a quote, or estimating overspray loss.
- Deposit efficiency shifts with standoff, spray angle, part geometry and powder — a single figure is an average, and edges or complex shapes lose more.
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 thermal spray gas or powder consumption? Multiply the area to coat by the draw per unit, then divide by the deposit efficiency. For 500 units at 0.08 per unit and 85% efficiency: 500 x 0.08 / 0.85 = 47.06 units required versus 40 units theoretical.
- What is deposit efficiency in thermal spray? The fraction of sprayed material that actually sticks to the part. HVOF carbides often run 45-70%, plasma varies widely, and combustion wire can be higher. The rest is overspray you still pay for — 7.06 units in the example.
- Why is required consumable higher than the theoretical amount? Because not all material lands on the part. At 85% efficiency the 40 theoretical units become 47.06 required units; the 7.06-unit gap is the loss allowance from overspray and process losses.
- How much extra powder should I order for overspray? Order to the required quantity, not the theoretical. At 85% efficiency you need about 18% more than the on-part amount; at 50% efficiency you need double. Always size to your actual measured deposit efficiency plus a small safety margin.
- What lowers deposit efficiency? Steep spray angles, long standoff, small or edge-heavy parts, and finer powder fractions all increase overspray. Coating a complex shape can drop efficiency well below the flat-plate number used for a quote.
Last reviewed 2026-05-12.