Gridfinity Generator
Make Gridfinity bins and baseplates in any size. Pick the grid units, height, stacking lip, magnet holes and dividers, turn the 3D preview, and download an STL that is checked to be watertight before you slice it.
- 1Pick bin or baseplate
- 2Set the size
- 3Download STL
3Preview and download
This browser can't show the 3D preview (WebGL is off). The STL is still built and checked below.
The model is built in your browser. Nothing is uploaded, and the STL is saved straight from this page.
1What to make
2Bin size and options
2Baseplate size
How to print it
- Slice it as it comes. The STL is in millimetres with the bottom flat on the bed. Bins and baseplates are designed to print without supports.
- Use a 0.2 mm layer height with a 0.4 mm nozzle. The 45° chamfers and the stacking lip print cleanly at that setting.
- PLA or PETG both work. PLA is the easy choice for a drawer. PETG is tougher if bins get handled a lot or sit somewhere warm.
- Magnets: press 6 × 2 mm magnets into the holes after printing, with a drop of glue if they are loose. Check the polarity so bins and baseplate attract.
- Print a 1 × 1 bin and a small baseplate first to check the fit with your printer before a long print.
Gridfinity sizes explained
Gridfinity uses a 42 mm grid. A bin is 0.5 mm smaller than its grid space, so it drops in with 0.25 mm of play on each side. Height counts in 7 mm units from the bottom of the feet to the top of the wall; the stacking lip adds 4.4 mm on top.
| Grid units | Grid space | Bin outer size |
|---|---|---|
| 0.5 | 21 mm | 20.5 mm |
| 1 | 42 mm | 41.5 mm |
| 2 | 84 mm | 83.5 mm |
| 3 | 126 mm | 125.5 mm |
| 4 | 168 mm | 167.5 mm |
| 5 | 210 mm | 209.5 mm |
| 6 | 252 mm | 251.5 mm |
Heights: 3 units is 21 mm, 6 units is 42 mm, 12 units is 84 mm, plus 4.4 mm with the lip. A baseplate is 4.65 mm tall as an open frame. A 5 × 5 baseplate (210 mm) fits a 220 × 220 mm bed, and a 6 × 6 (252 mm) fits a 256 × 256 mm bed.
What the check means
Before the download button turns on, the page reads the STL back from its own bytes. It checks that the triangle count matches the file, that every edge joins exactly two faces in opposite directions (a closed, manifold solid that slicers accept), and that the outer size matches your settings.
Gridfinity is an open-source modular storage system created by Zack Freedman. This generator follows the published Gridfinity dimensions. MakerJig is not affiliated with Zack Freedman or the Gridfinity project.
FAQ
What size is a Gridfinity unit?
One unit is 42 × 42 mm on the grid, and 7 mm in height. A 1 × 1 bin measures 41.5 × 41.5 mm so it fits its grid space with a little play. This generator also makes half units (21 mm) for narrow bins.
Is Gridfinity free to use?
Yes. Gridfinity is an open-source system created by Zack Freedman, and anyone can make and print parts that fit it. This generator is free too, with no account and no watermark.
What magnets do Gridfinity bins use?
The standard is 6 mm × 2 mm round magnets, four per grid cell, in holes 6.5 mm wide and 2.4 mm deep. Tick Magnet holes on the bin, the baseplate, or both. Half-unit cells are too small for them, so they get no holes.
Do Gridfinity bins need supports?
No. The feet, the stacking lip and the baseplate pockets all use 45° slopes, and the lip has a sloped support underneath, so they print flat on the bed without supports.
How tall should a Gridfinity bin be?
It depends on the drawer. Measure the inside height, take off the baseplate (4.65 mm), and divide by 7 to get the units that fit. Remember the 4.4 mm lip if you keep it. 3 units (21 mm) suits shallow drawers; 6 units (42 mm) is a common default.
Does this upload my design?
No. The model and the STL are made by your browser on your device. Your settings and the file are never sent to a server.