Gridfinity dimensions, exactly
Every number that makes a Gridfinity bin fit, in one place, and how this generator proves its models match the community reference to a few hundredths of a millimetre.
| Feature | Value | Why it matters |
|---|---|---|
| Grid pitch | 42 mm | Every cell, baseplate and bin is a multiple of 42 mm. |
| Height unit | 7 mm | A 6 u bin is 42 mm tall before the lip. |
| Bin clearance | 0.5 mm | Bin outside = 42 × n − 0.5 mm, so neighbours never bind. |
| Bin corner radius | 3.75 mm | Matches the baseplate pocket radius. |
| Base profile | 0.8 / 1.8 / 2.15 mm | 45° chamfer, vertical, 45° chamfer (4.75 mm), then a bridge to 7 mm. |
| Outer wall | 0.95 mm | Two perimeters with a 0.4 mm nozzle. |
| Stacking lip | +3.55 mm | Bins of n units stand 7n + 3.55 mm tall; the lip seats the next bin. |
| Label tab | 36°, 15.85 mm | Angled so it prints without supports. |
| Magnet holes | 6.5 × 2.4 mm | For 6 × 2 mm magnets, 26 mm apart, 4 per cell. |
| Screw holes | M3, 3 × 6 mm | Same positions as the magnets. |
| Baseplate | 5 mm, r 4 mm | Exactly 42 × n mm; magnet version adds a 2.8 mm floor. |
The base profile
The foot of every bin is a stepped chamfer that drops into the baseplate and self-centres. Distances are inset from the bin's outer edge.
How the geometry is verified
Each model type was rendered twice: once by this site's JavaScript (Manifold WASM, the same code that runs in your browser) and once by OpenSCAD from gridfinity-rebuilt-openscad with identical settings. Both meshes were then sampled at 40,000 surface points and compared. Distances are in millimetres.
| Model | Volume diff | Mean dist | Max dist | Watertight |
|---|---|---|---|---|
| bin 1x1x3 | +0.12% | 0.0043 | 0.046 | yes |
| bin 1x2x2 nolip | 0.00% | 0.001 | 0.023 | yes |
| bin 2x2x3 notab noscoop | +0.08% | 0.002 | 0.045 | yes |
| bin 2x3x6 d2x1 mag | +0.08% | 0.0021 | 0.045 | yes |
| bin 3x2x4 d3x2 | +0.1% | 0.0038 | 0.045 | yes |
| bp 3x2 thin | -0.26% | 0.0026 | 0.029 | yes |
The magnet baseplate is left out on purpose: the reference's magnet plate is a different design (a full-height weighted block), while this site's version is the 5 mm thin plate on a 2.8 mm floor with magnet pockets, checked by its dimensions instead. A further 80 random configurations (sizes, dividers, holes, tabs, padding) were generated and every one is a closed, watertight manifold. Every library STL is also sliced in OrcaSlicer to get the print times shown on its page.
Questions
Why is a 1×1 bin 41.5 mm and not 42 mm?
The grid is 42 mm, but each bin is 0.5 mm smaller so that two bins side by side drop into neighbouring baseplate pockets without rubbing.
How tall is a Gridfinity bin?
Height in units × 7 mm, plus about 3.55 mm of stacking lip. A 3 u bin is 21 mm to the top of the body and 24.55 mm to the top of the lip; a 6 u bin is 45.55 mm.
Who created Gridfinity?
Zack Freedman designed Gridfinity and published it under the MIT license. The community reference implementation used here is gridfinity-rebuilt-openscad by kennetek, also MIT.