3D Model Measure
Measure a 3D model in your browser: bounding-box size, volume, surface area, and triangle and vertex counts.
Report a problem
Drop a 3D model here and I’ll measure it.
.stl · .obj · .ply · .glb · .gltf · the first run loads the 3D engine once
How to use
- Drop a 3D model in, or tap the box to choose one. STL, OBJ, PLY, GLB and GLTF all work.
- I read the model in your browser and measure it: overall size, volume, surface area, and how many triangles and vertices it has.
- Read the numbers in the panel, or press Copy report to copy a plain-text summary you can paste into a quote, note or email.
FAQ
What units are the measurements in?
The tool treats one model unit as one millimetre, which is the convention for STL and most 3D-printing files. Size is shown in millimetres, volume in cubic millimetres (and cm³ / ml), and surface area in square millimetres (and cm²). If your file was modelled in other units, scale the numbers accordingly — for example, a metre-based file would read 1000× too large.
How is the volume worked out, and how accurate is it?
Volume is the signed-tetrahedron sum over every triangle — a standard exact formula for a closed (watertight) mesh. If the mesh has holes, flipped faces or self-intersections, the figure can be off, so treat it as a close estimate rather than a guarantee. Surface area is the exact sum of every triangle’s area.
Is my 3D model uploaded anywhere?
No. The model is read and measured entirely in your browser using a self-hosted 3D engine — it never leaves your device, so it works offline and stays private. The engine loads once on first use and is then cached.