Create3D.io
3D 3D Volume Calculator
Free 3D Volume Calculator
Use the free 3D volume calculator to upload an STL, OBJ, GLB, 3MF, PLY, or glTF file, set the final height, and calculate real-world volume, surface area, dimensions, fill ratio, mesh status, and material estimates directly in your browser.
STL, OBJ, GLB, 3MF, PLY, glTF
Real target-height scaling
Surface area + volume
Downloadable report
Measure your 3D model
Upload a 3D asset, pick a unit, and enter the final target height to calculate its real volume, surface area, dimensions, and material estimates.
Upload a 3D asset
Supports STL, GLB, glTF, OBJ, PLY, 3MF, and ZIP.
Original Model Details
Measurement Settings
Choose the unit used for the target height and all returned measurements.
cm
Enter the final height you want for this model. Minimum: 0.01.
Enter a valid height of 0.01 or greater.
Reading mesh data...0%
Calculation Complete
Review real volume, surface area, scaled dimensions, and basic material estimates.
Likely watertight
Volume-
Surface Area-
Dimensions-
| Measurement | Result |
|---|
Creator Planning
From 3D File to Real-World Decision
A 3D file can look perfect on screen and still be too large, too small, too expensive, or too hard to print. Create3D.io helps you check the physical numbers behind the model before you commit to printing, quoting, packaging, or publishing it.
Know the real size
Set the final height and instantly see scaled width, depth, and bounding box dimensions for the finished model.
Estimate material needs
Use model volume and surface area to plan filament, resin, coating, finishing, or production material.
Share a cleaner handoff
Download a simple report that helps clients, makers, print shops, or teammates understand the asset.
Check mesh reliability
Use watertight and non-manifold status to understand whether the volume is reliable or only an estimate.
Measurement Data
What Create3D.io Measures Inside Your Model
The calculator reads the mesh geometry, not just the file name or file size. After you define the target height, Create3D.io scales the model and reports the values that matter for real-world use.
- Volume: the enclosed space of the model after scaling.
- Surface area: useful for coating, painting, resin exposure, and finish planning.
- Bounding box: the final width, height, and depth your model occupies.
- Fill ratio and mesh status: a quick signal for density, hollow-looking geometry, and measurement reliability.
Use Cases
Built for Creators Who Need Numbers, Not Guesswork
Create3D.io is designed for people who create, sell, print, modify, or deliver 3D assets. Use it when visual preview is not enough and you need practical measurements.
3D printing makers
Check volume and dimensions before slicing or sending a model to print.
Etsy and product sellers
Estimate material needs before pricing figurines, miniatures, decor, or replacement parts.
Game and AR asset creators
Understand scale before turning an asset into a physical sample or collectible.
Product designers
Compare versions and understand how design changes affect volume and surface area.
Students and educators
Use real 3D files to explain volume, geometry, scaling, and surface area.
Print shops and freelancers
Create quick measurement reports before giving an early quote.
Workflow
A Faster Check Before Opening Heavy CAD Software
You do not always need a full CAD program just to answer basic production questions. Create3D.io gives you a fast browser-based check for model scale, volume, surface area, and material planning.
1
Upload or pick a model
Drop in your own STL, OBJ, GLB, glTF, PLY, or 3MF file, or start from a sample Create3D.io asset. The mesh is read right in your browser.
2
Set the final height
Because many 3D files do not store reliable units, Create3D.io scales the whole model from the target height you enter in cm, mm, or inches.
3
Review and download
See volume, surface area, scaled dimensions, bounding box, fill ratio, mesh status, and material estimates — then download a clean report.
Formats
Measure the 3D Formats Creators Actually Use
Create3D.io supports common 3D model formats used across printing, scanning, web 3D, design, and AI-generated assets.
STLPrint
STL volume calculator for miniatures, prototypes, replacement parts, and maker workflows.
OBJMesh
OBJ volume calculator for sculpted models, exported meshes, scans, and design previews.
GLB / glTFWeb
GLB and glTF volume calculation for web 3D, game assets, AR previews, and AI-generated models.
3MFModern
3MF volume calculator for modern 3D printing files that may include more structured print data.
PLYScan
PLY volume calculator for scans, research models, and point-cloud-to-mesh workflows.
Mixed assetsAI
Measure AI-generated or converted models before publishing, packaging, remixing, or preparing them for print.
Units & Numbers
Choose cm, mm, or Inches — and Know What Each Number Means
Create3D.io returns every measurement in the unit you pick, so the same model can be read for desktop prototyping, fine miniatures, or US imperial workflows. Set the unit once and the height, dimensions, surface area, and volume all follow.
Centimeterscm
The default for most desktop 3D prints, product mockups, and props. Volume is reported in cm³ and surface area in cm² — easy to compare across versions.
Millimetersmm
Best for miniatures, jewelry, mechanical parts, and tight-tolerance prints where small dimensions and fine detail need a finer scale.
Inchesin
Built for US makers and Etsy sellers who quote and ship in imperial units. Dimensions read in inches with volume in cubic inches.
Inside every Create3D volume report
VolumeThe enclosed solid space of the mesh after scaling — the headline number for material and weight planning.
Surface areaTotal outer area — what drives paint, resin exposure, coating, and finishing estimates.
Dimensions & bounding boxFinal width, depth, and height the model occupies once scaled to your target height.
Fill ratioHow much of the bounding box the solid actually fills — a quick read on density and hollow-looking geometry.
Mesh statusWhether the model is likely watertight or open — so you know if the volume is solid or an estimate.
Material estimateAn early planning number for filament or resin use, before slicer settings, infill, and supports.
Planning Questions
Questions Your Volume Report Helps Answer
A volume report is useful because it turns a visual asset into planning data. Before printing or sharing a model, use Create3D.io to answer practical questions.
Accuracy Notes
Accuracy Depends on Scale and Mesh Quality
Create3D.io calculates measurements from the mesh geometry after applying your target height. For closed, watertight models, volume results are much more reliable. For open or non-manifold meshes, the report should be treated as an estimate.
- Target height matters: it gives the calculator a real-world scale when file units are unclear.
- Watertight models are better: closed meshes produce more reliable volume results than open shells.
- Material estimates are planning numbers: slicer settings, supports, wall thickness, and calibration change the final usage.
Create3D Workflow
Create, Check, and Prepare 3D Models in One Workflow
Create3D.io is built around the full creator workflow: generate or upload a model, inspect it, measure it, convert it, and prepare it for real use.
FAQ
3D Volume Calculator FAQ
Learn how the 3D volume calculator measures STL, OBJ, GLB, glTF, PLY, and 3MF files, handles real-world scale, checks watertight meshes, protects browser privacy, and creates downloadable reports.
What is a 3D volume calculator?
A 3D volume calculator measures the enclosed volume of a 3D mesh after the model is scaled to a real-world size. Create3D.io also reports surface area, bounding box dimensions, fill ratio, mesh status, and material estimates.
Can I calculate STL volume online for free?
Yes. Upload an STL file, choose cm, mm, or inches, enter the final height, and Create3D.io calculates the model’s scaled volume, surface area, and dimensions in your browser.
Does Create3D.io work with OBJ, GLB, 3MF, PLY, and glTF?
Yes. Create3D.io supports common creator and 3D printing formats including STL, OBJ, GLB, glTF, 3MF, and PLY.
Why do I need to enter the target height?
Many 3D files do not include reliable real-world units. The target height tells Create3D.io how large the finished model should be, so width, depth, surface area, and volume can be scaled consistently.
Can I use the result for 3D printing material estimates?
Yes, but it should be used for planning. Actual filament, resin, or material usage may change depending on slicer settings, infill, wall thickness, supports, and printer calibration.
What does watertight mean for volume calculation?
A watertight model is fully closed, so it encloses a solid space. Watertight models produce more reliable volume results. Open or non-manifold meshes may still be measured, but the volume should be treated as an estimate.
Are my 3D files private?
Your file is processed in the browser for measurement and report generation. Create3D.io does not publish or expose your uploaded model.
Can I download a 3D volume report?
Yes. After calculation, you can download a clean report with the model’s volume, surface area, dimensions, fill ratio, mesh status, and material planning data.
How do I calculate the volume of a 3D model for printing?
Upload your STL, OBJ, GLB, glTF, PLY, or 3MF file into Create3D.io, choose cm, mm, or inches, and enter the final height you plan to print. The calculator scales the mesh to that height and returns solid volume plus an early material estimate you can use for planning.
Can I switch between cm, mm, and inches?
Yes. Pick your unit before calculating and every value — target height, width, depth, surface area, and volume — is returned in that unit, so US imperial and metric workflows are both covered.
Does the calculator estimate model weight?
Create3D.io reports solid volume, which is the starting point for weight. Multiply the volume by your material density (for example PLA, resin, or PETG) to estimate weight. Treat it as a planning figure, since infill and wall thickness change the real result.
Will this work on my phone?
Yes. The Create3D.io volume calculator runs in the browser and is built for both desktop and mobile, so you can upload, measure, and download a report on a phone, tablet, or computer.
How accurate is the volume result?
For closed, watertight meshes the volume is computed directly from the triangle geometry and is highly reliable. For open or non-manifold meshes, Create3D.io still returns a measurement but flags it as an estimate, so you always know how much to trust the number.
Turn a 3D Model Into a Build-Ready Volume Report
Create3D.io helps creators move from visual preview to practical planning: generate or upload a model, check its size, measure volume, estimate material needs, and prepare a cleaner handoff.