02 / ACCOUNT
Count the material your job actually needs
The weight of the finished object may differ from the material consumed by a job. Your selected slicer and settings determine which components its total includes. Read that software’s documentation and the job breakdown before using a number.
Keep one accounting basis
- Record whether the entered job estimate includes supports, skirts, priming, purge, flushing, or other material.
- Use a lower and upper estimate for that same total. Previous measured jobs can help you understand your own setup; they do not establish a universal error percentage.
- The extra reserve field adds grams to both job bounds. Include only a planning allowance not already represented in the job range.
- If a total already covers an allowance, do not add it again. Zero is an appropriate extra reserve when you deliberately include all allowances in the entered job range.
Original worked example
Illustrative job range: 104–110 g, already including supports and the slicer’s purge estimate. Add a user-chosen 5 g extra allowance for material outside that range. Required material becomes 109–115 g. A second purge entry would double-count that component.
When comparisons are misleading
Do not compare grams with meters or ounces. This experiment accepts grams only; it does not infer filament density. For multiple materials, one spool’s available grams must be compared with that spool’s own consumption. It cannot validate a combined multi-spool total.
Changing a job changes the estimate. Calculate again after editing inputs. The result clears immediately so a stale verdict cannot be mistaken for a current one.
Read before relying on a margin
A mass comparison says nothing about feed problems, tangles, moisture, material quality, or successful printing. Use printer and slicer instructions independently. No percentage reserve guarantees completion.
Reference: Filamentcalcs’ public explanation distinguishes a planning margin from a measured guarantee. Our tool uses entered intervals instead of its fixed caution rule.