How 3MF volume differs from STL volume
3MF declares a unit and build structure, so this calculator can convert resolved geometry using the file’s declared unit.
Why build items and transforms matter
Placed copies and supported transforms are included in the total because they belong to the print build.
Why watertightness affects volume accuracy
Volume is most meaningful for closed, consistently oriented geometry.
How the optional material estimate works
It multiplies solid-model volume in cubic centimetres by your local density input; the input is not sent to analytics.
FAQ
Is the volume exact?
It is reliable only for suitable closed geometry; warnings identify known concerns.
Does it include infill or supports?
No.
Does a 3MF with several parts work?
Yes, resolved build items are aggregated.
Is the file uploaded?
Yes, through the same secure processing flow used by the other 3MF checks.