3D print weight and filament calculator

Attach an STL, OBJ, GLB, 3MF, or STEP file and get its filament weight in grams, length in meters, and material cost, computed from the real model volume. Free, in your browser.

Estimate filament weight and cost for the attached model

Files are processed entirely in your browser. Nothing is uploaded to a server.

Any 3D edit is just a prompt away.

How the STL weight estimate is calculated

The tool computes the exact solid volume of your mesh, then models a typical print: solid outer walls (~1.2 mm) plus your chosen infill percentage inside. Multiply by the material's density and you get grams; divide by the cross-section of 1.75 mm filament and you get meters. It's the same math slicers use for their material estimates, without installing or configuring anything.

Frequently asked questions

Why does my slicer show a different weight?

Slicers know your exact wall count, top/bottom layers, supports and brim. This estimate uses a typical 1.2 mm shell, so expect the slicer number to land within roughly ±15% of it.

Does it work for resin prints?

Yes. Pick the resin preset and set infill to 100% for solid parts, or lower it if you hollow your models before printing (resin prints are usually hollowed to 2-3 mm walls).

More free 3D file tools

View a model Repair a model Reduce file size Convert 3D files Measure a model Scale a model Split a model Mirror a model Print orientation

Describe a part. Get a printable model.

GrandpaCAD turns a text prompt into a ready-to-print 3D model. Functional parts, organic shapes, multi-color prints. No CAD skills needed.

"Model a lightweight hexagonal honeycomb wall planter, 120 mm wide, that prints without supports."

3 free generations, no card required

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3D print weight and filament calculator

Attach an STL, OBJ, GLB, 3MF, or STEP file and get its filament weight in grams, length in meters, and material cost, computed from the real model volume. Free, in your browser.

Estimate filament weight and cost for the attached model

Files are processed entirely in your browser. Nothing is uploaded to a server.

Any 3D edit is just a prompt away.

How the STL weight estimate is calculated

Frequently asked questions

Why does my slicer show a different weight?

Slicers know your exact wall count, top/bottom layers, supports and brim. This estimate uses a typical 1.2 mm shell, so expect the slicer number to land within roughly ±15% of it.

Does it work for resin prints?

Yes. Pick the resin preset and set infill to 100% for solid parts, or lower it if you hollow your models before printing (resin prints are usually hollowed to 2-3 mm walls).

More free 3D file tools

View a model Repair a model Reduce file size Convert 3D files Measure a model Scale a model Split a model Mirror a model Print orientation

Describe a part. Get a printable model.

GrandpaCAD turns a text prompt into a ready-to-print 3D model. Functional parts, organic shapes, multi-color prints. No CAD skills needed.

"Model a lightweight hexagonal honeycomb wall planter, 120 mm wide, that prints without supports."

3 free generations, no card required