234 is the example result. Read it using the units and relationship stated below.
3D Print Marketplace Profit uses units sold, selling price per unit, production cost per unit.
Making a print estimate reflect the work behind the part
For 3d print marketplace profit, the relationship is Contribution = units × sale price × (1 − fee% ÷ 100) − units × (unit cost + shipping per unit) − ad spend − other costs. The amount depends on the supplied units sold, selling price per unit, rather than a live market price or a value imported from another record. Filament cost is only one component of a printed part. Machine time, failed jobs, setup, labour and fulfilment can materially change contribution. Compare grams with the usable spool weight, rather than the label price alone.
What the model includes
Contribution = units × sale price × (1 − fee% ÷ 100) − units × (unit cost + shipping per unit) − ad spend − other costs. Use measured print duration where possible and keep machine-hour charges separate from electricity. If the machine rate already includes energy or labour, entering those amounts again double counts them. The model cannot infer a failure rate from a successful test print. A quote still needs the part requirements and production method. Material choice, orientation and finishing affect quality; this estimate does not establish mechanical suitability or guarantee the print will succeed.
Example with the supplied inputs
Units sold: 20; Selling price per unit: 40; Production cost per unit: 15; Marketplace fee (%): 12; Shipping per unit: 5; Advertising spend: 50; Other costs: 20. Result: 234. The values are illustrative.
Compare one changed input
Units sold changes from 20 to 22. The result becomes 264.4. All other inputs remain fixed.
Calculation rule
Contribution = units × sale price × (1 − fee% ÷ 100) − units × (unit cost + shipping per unit) − ad spend − other costs.
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Units sold | 20 | Use the source quantity represented by units sold. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Selling price per unit | 40 | Use selling price per unit on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
| Production cost per unit | 15 | Use production cost per unit on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
| Marketplace fee (%) | 12 | Enter marketplace fee (%) on the percentage scale used in the formula (20 means 20%, not 0.20). Keep its base and reporting period consistent with the other inputs. |
| Shipping per unit | 5 | Use the source quantity represented by shipping per unit. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Advertising spend | 50 | Use advertising spend on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
| Other costs | 20 | Use other costs on the currency and period basis shown by the formula. Keep gross amounts, net amounts and unit amounts distinct; the page does not fetch a price or exchange rate. |
Output: 234 is the example result. Read it using the units and relationship stated below. Use the formula to distinguish a cash amount, count, percentage or ratio.
How to use the page
Collect the inputs
Gather Units sold, Selling price per unit, Production cost per unit. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Units sold on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 234.
Change Units sold from 20 to 22 while keeping every other value fixed. The result becomes 264.4. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026