5 is the example result. Read it using the units and relationship stated below.
3D Print Waste uses usable material (g), starting material (g).
Making a print estimate reflect the work behind the part
For 3d print waste, the relationship is Result = (([Starting material (g)] − [Usable material (g)]) ÷ ([Starting material (g)])) × 100. The amount depends on the supplied usable material (g), starting material (g), 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
Result = (([Starting material (g)] − [Usable material (g)]) ÷ ([Starting material (g)])) × 100 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
Usable material (g): 95; Starting material (g): 100. Result: 5. The values are illustrative.
Compare one changed input
Usable material (g) changes from 95 to 104.5. The result becomes -4.5. All other inputs remain fixed.
Calculation rule
Result = (([Starting material (g)] − [Usable material (g)]) ÷ ([Starting material (g)])) × 100
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Usable material (g) | 95 | Use the source quantity represented by usable material (g). Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Starting material (g) | 100 | Use the source quantity represented by starting material (g). Keep the counted population fixed and avoid mixing a unit value with a period total. |
Output: 5 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 Usable material (g), Starting material (g). 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 Usable material (g) 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 5.
Change Usable material (g) from 95 to 104.5 while keeping every other value fixed. The result becomes -4.5. 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