Compute the exact surface area (mm²) of any STL, OBJ, or GLB mesh. Useful for paint estimates, plating cost, and resin coating calculations.
Upload your 3D model
We sum triangle areas via the cross-product magnitude formula
Get total surface area in mm² and cm²
0 bytes uploaded. Surface Area Calculator runs entirely in your browser using three.js and WebGL. Your meshes never leave your device.
Estimating paint volume, electroplating cost, resin curing time, anodisation surface, or thermal radiation calculations for engineering parts.
Yes. Every triangle face is counted. For a hollow mesh, both inner and outer surfaces contribute.
Yes — the calculation is per-triangle and exact. Floating-point precision is sufficient for any model size.
Compute the exact volume of any STL/OBJ/GLB mesh in cm³ and estimate weight for PLA, ABS, PETG, resin, and 8 metals. Browser-based.
Open toolCompute the X/Y/Z bounding box of any STL, OBJ, or GLB mesh. Get exact print dimensions in mm — useful for fitting models to your printer bed.
Open toolFind walls thinner than your minimum print threshold. Ray-cast across the mesh to detect thin sections that may fail to print or break. Browser-based.
Open tool