Inspect · Volume & surface area

What is this model's volume?

Get a model's enclosed volume and surface area, or, when the mesh cannot support one, the specific structural reason a volume figure is withheld.

An enclosed-volume figure is only meaningful for a mesh that is genuinely closed and consistently oriented: open boundary edges, non-manifold edges, or inconsistent triangle winding make the number meaningless, so it is withheld rather than printed anyway with false confidence. This page leads with that number, or with the exact reason it is missing.

Surface area does not depend on the mesh being closed, so it is always reported alongside volume, whichever way that turns out.

This page leads with one question; the rest of the report is below. Open the full Inspect report →

Step 01

Choose a model

Select one supported file to inspect immediately using common millimetre and right-handed Z-up defaults. If the source uses a different frame, adjust its Expert settings first.

ModelChoose a modelSTL, OBJ, glTF, GLB, or 3MF, up to 32 MiB

Expert settings

Change these only when the source uses a different unit or up-axis. The selected values are recorded with the inspection.

Source unitSource up-axis

Choose a local model file.

Choose a source file

Local boundary: the source file and its geometry stay inside this browser's dedicated inspection worker; only the structured report leaves the worker, and nothing is uploaded.