View CAD files. Measure models.
Dimensions, volume & weight.
View STEP, IGES, STL and more online. Measure dimensions, volume and surface area; estimate weight from density. Capabilities vary by format. No account needed.
Compare CAD files
Review versions side by side, with synchronized views and property differences.
Export STEP properties to CSV
Calculate properties for multiple STEP files and download one CSV.
CAD measurement and property calculators
Inspect model dimensions, calculate volume and surface area, or estimate weight using your chosen material density. Available properties depend on the format and geometry; mesh results are approximate.
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Dimensions & measure
Check STEP bounding dimensions in source coordinates and pick approximate point distances in an interactive 3D viewer. Source units are normalized to millimetres.
Take a closer look →PropertiesVolume calculator
Calculate solid volume from STEP B-Rep geometry. Check model validity, source units and assembly scope before using or exporting the result.
Take a closer look →PropertiesSurface area
Calculate surface area from STEP geometry, inspect individual parts and export the result in mm². Keep open surfaces and solid-volume requirements distinct.
Take a closer look →PropertiesWeight calculator
Estimate mass from valid STEP solid volume and your chosen material density. Inspect the model, verify units and download a property CSV without an account.
Take a closer look →ViewingSTEP viewer
Open STEP and STP files in a real 3D viewer. Inspect parts, units and geometry properties without an account.
Take a closer look →ViewingIGES / IGS viewer
Inspect IGES surfaces and solids using Open CASCADE. Read dimensions and surface area; volume and mass require valid closed solids.
Take a closer look →Know the limits.
Can I measure a STEP or STP file online?
Yes. Upload a STEP or STP file to inspect its 3D geometry and overall X, Y and Z dimensions. Point-to-point distances picked in the viewer are approximate. Switch display units between metric and imperial without changing the source geometry.
How are CAD volume, surface area and weight calculated?
STEP and IGES properties are calculated from B-Rep geometry. Volume requires valid closed solids; calculated mass is volume multiplied by your chosen material density. Check the model units, loaded parts and density before using the results.
Can I measure STL files and other mesh models?
You can inspect supported STL, OBJ, 3MF and static GLB/GLTF models. Mesh dimensions and surface properties come from triangle geometry; volume and density-based mass are approximate and require a closed, consistent mesh. DWG support is a 2D preview, without physical properties.
Do I need to install CAD software or create an account?
No installation or account is required. Selecting a file starts temporary server processing. Files are accessible through your guest session and expire after the configured retention period shown in the workspace; you can delete them earlier from the file menu.
CAD measurement, volume and weight guides
MeasurementMeasure STEP Files Online: Dimensions, Distances & Units
Read a CAD model without confusing bounding-box dimensions, selected geometry measurements and drawing tolerances.
Read the guide →
MeasurementCalculate STEP File Weight from Volume and Density
Work from valid solid volume, choose a documented density and keep units, configuration and assembly scope visible in the result.
Read the guide →
Versions & reviewCompare CAD Revisions: Geometry and Property Checks
Use fixed versions, explicit units and a deliberate alignment method before interpreting overlays or property differences.
Read the guide →