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3DAI
Free · runs in your browser · no signup

Gridfinity Bin Generator

Set the size, the compartments and the extras, watch the bin update in 3D, and download a watertight STL or 3MF for your slicer. It all runs in your browser: no signup, no upload, no waiting in a queue.

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How to make a Gridfinity bin

  1. 1

    Pick the size

    Width and depth in 42 mm grid units, height in 7 mm units. The readout shows the real size in millimetres.

  2. 2

    Split the inside

    Add compartments across and front to back, then a finger scoop and a label tab if you want them.

  3. 3

    Choose the base

    Keep the stacking lip, and add magnet holes or M3 screw holes in the feet if your baseplate uses them.

  4. 4

    Download and print

    Save an STL or 3MF in millimetres and open it in your slicer. Copy the link to make the same bin again later.

What each option means

Width and depth (grid units)
Gridfinity uses a 42 × 42 mm grid. A bin is 0.5 mm smaller than its cells, so 1 unit is 41.5 mm, 2 units are 83.5 mm, and so on. This tool goes from 1 to 8 units each way.
Height (7 mm units)
Heights count in 7 mm steps, from 2 (14 mm) to 12 (84 mm). The stacking lip adds 4.4 mm on top of that.
Compartments
Splits the bin with 1.2 mm dividers into equal cells across (X) and front to back (Y). If a cell would get narrower than 6 mm, the tool uses fewer and tells you.
Wall thickness
The outer wall, 0.8 to 2.4 mm. 1.2 mm is three lines with a 0.4 mm nozzle on most slicers; go thicker for heavy parts.
Finger scoop
A curved ramp at the front of each row, so you can slide small screws and parts out with one finger.
Label tab
An angled shelf along the back wall of each row, up to 15.85 mm deep. Its underside slopes at 36° from flat, a short overhang most printers manage without supports. Stick a label on it.
Stacking lip
The profiled rim at the top that lets another bin sit on this one. Turn it off for bins that live under a drawer lid.
Magnet holes
6.5 mm wide, 2.4 mm deep pockets in the four corners of every unit, for 6 × 2 mm disc magnets that hold the bin to a magnetic baseplate.
M3 screw holes
3 mm holes, 6 mm deep, in the same corners, for screwing a bin down or to a baseplate with screw bosses.
Baseplate
Switch to Baseplate to make a plain open-frame grid (5 mm tall) for bins to sit in. Type your drawer size and it tells you how many cells fit.

Print settings tips

  • Print bins upright, feet on the bed, with no supports. The foot and lip slopes are 45°. The label tab underside is a flatter 36° overhang, so keep part cooling on; if it droops, turn the tab off or add supports just under it.
  • A 0.4 mm nozzle with 0.2 mm layers is a common setting. A wall that is a whole number of line widths (0.8, 1.2, 1.6 mm) prints cleaner than one in between.
  • For magnet holes, check one magnet in a test print first. Printers differ, and a hole that is tight on one machine can be loose on another; a drop of glue fixes a loose fit.
  • Big bins and baseplates can warp at the corners. A brim or a clean, well levelled bed helps; print a 1 × 1 first to check the fit before a large one.
  • PLA and PETG both work for storage bins. Use PETG if the bins will sit somewhere warm, such as a car or a sunny shelf.

Want to know what a print will cost? Our 3D print cost calculator is coming soon.

Need more than a bin?

The bin generator is free. Our AI tools make models a parametric generator cannot, and they use credits.

Generate any 3D model from text →Need something that is not a box? Describe it and AI makes a printable 3D model with an STL download.Texture it with AI →Upload a 3D model, describe the look, and AI paints its surface. Download a textured GLB.

More free 3D printing tools

STL viewerOpen your STL in the browser and check it before slicing.Image to STLTurn a photo of an object into a printable model.3D text generatorMake 3D letters and name tags for your bins.

Frequently Asked Questions

Gridfinity is an open modular storage system by Zack Freedman: bins on a 42 × 42 mm grid that sit in a printed baseplate, with heights in 7 mm steps. A bin generator makes a bin at the exact size you need, with your choice of dividers, scoop, label tab and holes, so you do not have to find a model that happens to fit.
Yes. The generator runs in your browser and needs no account. There are no credits, no watermark and no limit on how many bins you download.
They are built from the published Gridfinity dimensions: 41.5 mm per unit, a 4.75 mm foot, 7 mm height units and a 4.4 mm stacking lip, so they are made to fit standard Gridfinity baseplates and bins. Printers differ, so print one 1 × 1 bin first and check it in your baseplate before printing a big batch.
Both hold the same watertight mesh in millimetres. STL works in every slicer. 3MF is a newer format that stores the unit with the model, so it never opens at the wrong scale; PrusaSlicer, Bambu Studio, OrcaSlicer and Cura all open it.
The holes are 6.5 mm wide and 2.4 mm deep, for the 6 × 2 mm disc magnets the Gridfinity spec uses. There are four per grid unit, one in each corner of the foot.
Yes. Switch to Baseplate to make a plain open-frame grid, 1 to 8 cells each way and 5 mm tall. Type your drawer width and depth to see how many 42 mm cells fit and how much space is left over. If the plate is bigger than your print bed, print several smaller ones and set them side by side.

Gridfinity is an open-source storage system created by Zack Freedman and released under the MIT licence. This generator is an independent tool built from the published Gridfinity dimensions; it is not affiliated with or endorsed by Zack Freedman.