3D Printing Efficiency (Commercial) Calculator FAQ
Answers to common questions about commercial 3D printing cost, material use, yield, machine time, waste, and post-processing inputs.
This FAQ explains the calculator's inputs and results, including how failed attempts affect cost and capacity estimates. It is intended for general production planning and estimating.
General calculator questions
Basic questions about what the calculation estimates.
What does this commercial 3D printing efficiency calculator estimate?
It estimates material used per attempt, successful yield, expected machine hours per good part, material utilization, and expected direct cost per acceptable part.
Who can use this calculator?
It can be used for general estimating across filament, resin, powder, and other additive processes when suitable inputs are available.
Is the output a quotation or selling price?
No. It is a direct-cost estimate and does not automatically include profit, taxes, commercial terms, or all job-specific costs.
What is a good part?
A good part is an attempt that meets the acceptance standard used for the estimate after required finishing and inspection.
Inputs and calculation method
How the calculator uses volume, rates, waste, and labor inputs.
Where should part volume come from?
Use the model's solid material volume from CAD or slicer software. Avoid using only an external bounding-box volume.
How should material density be entered?
Enter the density for the material and process being used, in grams per cubic centimeter.
What belongs in the support and waste allowance?
It may include supports, rafts, brims, purge material, resin losses, powder losses, and other material that does not remain in the finished part.
What should the machine rate include?
It can include the machine-related costs the operator wants to recover, such as energy, maintenance, depreciation, space, and overhead.
Why is post-processing entered separately?
Post-processing often depends on the accepted part and is therefore added as labor per good part rather than per print attempt.
Yield and failure rate
How print failures affect expected cost and time.
What is successful yield?
Successful yield is 100% minus the expected print failure rate. An 8% failure rate produces a 92% successful yield.
Why does a failure rate increase machine hours per good part?
Some machine time is spent on attempts that do not result in accepted parts, so expected hours are divided by the successful-yield fraction.
Does the calculator assume every failed print runs to completion?
Yes. It assumes each failed attempt uses the same material and machine time as a full attempt, which is a simplifying estimate.
Can the failure rate be zero?
Yes. With a zero failure rate, the expected print cost and machine hours are not increased for failed attempts.
How can I choose a failure rate?
A practical approach is to use historical results for a similar machine, material, geometry, orientation, and workflow where available.
Accuracy and scope
What is and is not included in the estimate.
What costs are excluded by default?
Design, setup labor, tooling, shipping, packaging, taxes, and profit are excluded unless included through the rates or handled separately.
Does material utilization include failed attempts?
No. It compares finished-part material with material used in one attempt. Failure effects are reflected separately in expected cost and machine hours.
Can the calculator handle batch production?
It can provide a per-part starting estimate, but shared build time, nesting, setup, and correlated failures need separate batch analysis.
Why might actual cost differ from the estimate?
Actual material consumption, stoppages, partial failures, rework, finishing requirements, and rates can differ from the assumptions entered.
How is expected cost per good 3D printed part calculated?
The calculator adjusts material and machine cost per attempt for successful yield, then adds post-processing labor per accepted part.
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