Metal AM Powder Calculator
Calculate metal powder usage, recyclable powder, and cost for DMLS/SLM additive manufacturing.
About this calculator
Metal powder-bed fusion (DMLS/SLM) is unusual among 3D printing processes because the machine doesn't just consume the powder that becomes your part — it fills the entire build chamber with powder at roughly 60% packing density, then only a fraction of that gets fused by the laser. This calculator starts from your part and support volumes, converts them to a sintered weight using the density of your chosen alloy (Ti-6Al-4V at 4.43 g/cm³, SS 316L at 7.99, AlSi10Mg at 2.67, or Inconel 718 at 8.19), and separately estimates the total powder needed to fill a 250x250mm build plate to your specified height. The difference between that total fill volume and what actually gets sintered is un-sintered powder, most of which can be sieved and reused — you control how much via the recycle rate input, which determines how much virgin powder must be purchased versus how much comes from the recycling loop.
The buy-to-fly ratio this produces (net powder consumed divided by finished part weight) is the standard industry metric for material efficiency; values near 1 are excellent, while ratios above 3-4 suggest you'd benefit from nesting more parts per build or reducing support volume. Keep in mind this model assumes a fixed build plate footprint and a flat 60% packing density — real machines vary, and material cost per kg here uses representative market prices that shift with supplier and order volume, so the dollar figure is only as good as the per-kg price you enter — swap in your actual supplier quote to bid a real job.
Inputs
Results
Part weight (g)
44.3
Net powder consumed (kg)
4.18
Powder cost ($)
$1,254.58
≈ 10 pairs of sneakers
How to Use This Calculator
- Enter Part volume (cm³), Support volume (cm³), and Material (1-4).
- Set Powder recycle rate (%) and Build height (mm).
- Review Part weight (g), Net powder consumed (kg), and Powder cost ($) ($).
- Use Support weight (g) and Total sintered (g) to inform your decision.
How the result changes with Part volume (cm³)
| Part volume (cm³) | Part weight (g) | Net powder consumed (kg) | Powder cost ($) |
|---|---|---|---|
| 5 | 22.2 | 4.17 | $1,251.25 |
| 7.5 | 33.2 | 4.18 | $1,252.91 |
| 15 | 66.4 | 4.19 | $1,257.90 |
| 25 | 110.8 | 4.22 | $1,264.54 |
What each input means
- Part volume (cm³)
- Volume of the final part in cubic centimeters from CAD.
- Support volume (cm³)
- Volume of support structures. Typically 20-50% of part volume for complex geometries.
- Material (1-4)
- 1 = Ti-6Al-4V (4.43 g/cm³), 2 = SS 316L (7.99), 3 = AlSi10Mg (2.67), 4 = Inconel 718 (8.19).
- Powder recycle rate (%)
- Percentage of un-sintered powder that can be reused. Typically 40-70% depending on material and sieve quality.
- Build height (mm)
- Height of the build in the powder bed (Z dimension). Affects total powder volume needed.
What each result means
- Part weight (g)
- Weight of the finished part.
- Support weight (g)
- Weight of support structures that will be removed.
- Total sintered (g)
- Total weight of material fused by the laser.
- Net powder consumed (kg)
- Virgin powder consumed after accounting for recycling.
- Recyclable powder (g)
- Amount of un-sintered powder that can be reused.
- Powder cost ($)
- Cost of net powder consumed at current material pricing.
- Buy-to-fly ratio
- Ratio of total powder consumed to final part weight. Lower is more efficient.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersPart volume (cm³) = 10, Support volume (cm³) = 3, Material (1-4) = 1, Powder recycle rate (%) = 50 = 5 input(s) provided
- Calculate Part weightPart weight = partVolumeCm3 * mat.density44.3 = 44.3
- Calculate Net powder consumedNet powder consumed = netPowderConsumedG / 10004.18 = 4.18
- Calculate Powder costPowder cost = netPowderConsumedKg * mat.costPerKg1254.58 = $1,254.58
- Calculate Support weightSupport weight = round((supportVolumeCm3 * mat.density) * 10) / 1013.3 = 13.3
- Calculate Total sinteredTotal sintered = totalSinteredVolume * mat.density57.6 = 57.6
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why does the calculator count powder for the whole build chamber, not just my part?
Powder-bed fusion machines flood the entire build volume with powder at roughly 60% packing density before the laser ever fires, so the machine has to be loaded with far more powder than the part actually needs. This calculator estimates that full-chamber fill volume from your build height and a fixed 250x250mm plate, then subtracts what actually gets sintered to find how much powder sits unused around your parts.
What does the buy-to-fly ratio tell me?
Buy-to-fly is net powder consumed divided by finished part weight, and it's the standard industry shorthand for material efficiency in metal AM. A ratio near 1 means almost all the powder you bought ended up in the part; ratios above 3-4 signal you're consuming several times the part's weight in powder, usually because of low nesting density, heavy supports, or a low recycle rate.
How much does raising the recycle rate actually save?
The recycle rate input determines what fraction of un-sintered powder gets sieved and reused versus purchased new. Since net powder consumed is sintered weight plus only the un-recycled remainder, moving the recycle rate from 50% to 70% roughly cuts your virgin-powder purchase (and cost) for the un-sintered portion by more than a third, though the sintered part-and-support weight itself never changes.
Why do the four materials have such different costs even at similar densities?
The cost gap reflects real market pricing for the raw alloy powders, not the calculator's math: Ti-6Al-4V and Inconel 718 are priced far higher per kg (around $300 and $250) than SS 316L (around $80) because titanium and nickel-superalloy powders are more expensive to atomize and are used for higher-performance aerospace and medical parts, while stainless steel powder is a commodity by comparison.
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